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Mayss Saadoon

U.S. Army corps of engineers

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ABSTRACT:

See USACE CWMS - Roanoke Watershed Collection Resource

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See USACE CWMS - Delaware River Watershed Collection Resources

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See USACE CWMS - Delaware River Watershed Collection Resource

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See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Big Sandy River Watershed Rivers
Created: June 18, 2018, 5:05 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Big Sandy River Watershed Collection

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Collection Resource Collection Resource
USACE CWMS - Tulare Lakebed Watershed
Created: June 25, 2018, 3:09 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The natural river and stream channels have been modified
extensively over the years for irrigation, water supply, flood control, recreation, power production, and
other purposes. Four flood control dams have been built on the major rivers leading to Tulare Lake;
Isabella and Pine Flat Dams were built in the early 1950's, Success and Terminus Dams in the early
1960's. Isabella Lake, Pine Flat Lake, Success Lake, and Lake Kaweah (formed by Terminus Dam)
together provide nearly 2 million acre-feet of water storage for the southern San Joaquin Valley. The
remaining rivers, streams, and creeks located in the basin have minor or no storage facilities along their
channel, however there is an extensive irrigation and flood control diversion and canal system throughout
the basin. Pine Flat and Isabella Lake are both reservoirs filled mainly by snowmelt, and Lake Kaweah
and Success Lake both received their runoff mainly from rainfall.
The Tulare Lakebed area has an extensive levee and diversion system designed to manage irrigation
flows and minor flood flows from the four projects and the surrounding uncontrolled drainage area. These
levees are designed to confine floodwaters to the smallest practicable area. However, large amounts of
uncontrolled runoff may cause damage in the Tulare Lakebed area, even when they are less than the
maximum flows the rivers are designed to handle. The magnitude of flows may exceed the diversion
system capacity and damage land protected by the levee system or adjacent areas. Two basins
(Hacienda and South Wilber) at the south end of Tulare Lakebed have been reserved for flood control
storage. The total storage capacity of these two basins is 37,000 acre-feet. Canal flows can either be
pumped into the storage basins or allowed to enter by gravity flow.

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Composite Resource Composite Resource
USACE CWMS - Tulare Lakebed Watershed
Created: June 25, 2018, 4:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Tulare Lakebed Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Tulare Lakebed Watershed Bank Lines
Created: June 25, 2018, 4:43 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Tulare Lakebed Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Tulare Lakebed Watershed Centerline
Created: June 25, 2018, 5:01 p.m.
Authors: Mayss Saadoon

ABSTRACT:

Centerlines of stream digitized at 1:15,000.

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Tulare Lakebed Watershed Conversion Points
Created: June 25, 2018, 5:09 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Tulare Lakebed Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Tulare Lakebed Watershed Study Area
Created: June 25, 2018, 5:13 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Tulare Lakedbed Watershed (Collection)

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Collection Resource Collection Resource
USACE CWMS - Upper South Platte Watershed
Created: June 25, 2018, 5:27 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

Within the South Platte basin, there are three USACE reservoir projects. All are located in or near the Denver metropolitan area. The projects are Cherry Creek Dam (on Cherry Creek), Bear Creek Dam (on Bear Creek), and Chatfield Dam (on the South Platte River). Their project purposes include flood control, recreation, and fish and wildlife. In addition, Chatfield Dam is authorized for water supply. Other water municipalities, namely Denver Water and Aurora Water, own and operate an intricate water infrastructure of, among other things, dams, diversions, canals, and water treatment plants.
A few of the notable tributaries to the South Platte River include Cherry Creek, Bear Creek, Tarryall Creek, Plum Creek, Clear Creek, Boulder Creek, St. Vrain River, Big Thompson River, and Cache la Poudre River. Though the following is not an exhaustive list, the key gages in the basin include Bear Creek at Morrison, Sheridan, and Denver; Cherry Creek at Franktown, Parker, and Denver; and South Platte at Waterton, Louviers, blw Chatfield, Denver, and Henderson.
During non-flood control operations, the three USACE reservoirs are operated based on water rights criteria provided to the Omaha District by the State of Colorado. In this case, Cherry Creek and Bear Creek release inflows, while Chatfield does have some authorized water supply storage. During flood control operations, the three reservoirs target the South Platte River at Denver, Colorado stream gage. The target maximum flow at this gage is 5,000 cfs. This would include both the reservoir releases and incremental flow. During flood control operations, there are provisions aimed at balancing the amount of flood control storage present in each of the three projects.
The South Platte watershed is mountainous in the western portion while the central and eastern portions are more indicative of the high plains. Average annual precipitation in the Denver metropolitan area is approximately 16 inches – with most of this coming as rain in the April to August timeframe. The mountains receive a variable annual snowpack with places exceeding 100 inches. Snowmelt, along with spring/summer rains, promotes the flooding concerns. Bear Creek and Chatfield watersheds are affected by the mountain snow while the Cherry Creek watershed lies in the high plains portion of the South Platte Basin.

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USACE CWMS - Upper South Platte Watershed
Created: June 25, 2018, 6:14 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Upper South Platte (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Upper South Platte Watershed Bank Lines
Created: June 25, 2018, 6:19 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Upper South Platte (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Upper South Platte Conversion Points
Created: June 25, 2018, 6:28 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Upper South Platte

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Upper South Platte Study Area
Created: June 25, 2018, 6:32 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Upper South Platte (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Upper South Platte Stream Align
Created: June 25, 2018, 6:35 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Upper South Platte (Collection)

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Collection Resource Collection Resource
USACE CWMS - West Branch Susquehanna Watershed
Created: June 25, 2018, 6:42 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The West Branch Susquehanna River Watershed covers almost 7000 square miles in central and north-central Pennsylvania. The upper or western part of the watershed lies mainly in the Appalachian Plateau Physiographic Province and is generally characterized by narrow flat-bottomed valleys with steep walls rising to rolling plateaus. Low mountains typically range up to 2500 feet in elevation. Most of the area is forested, with numerous state parks, state forests, and state game lands. Stream gradients along the main stem West Branch Susquehanna River in this portion of the watershed average about 6 feet per mile. Some tributary streams, however, have gradients that exceed 15 to 20 feet per mile, contributing to quick increases in runoff during intense storms or rapid snowmelt events. The eastern part of the watershed lies mainly in the Ridge and Valley Physiographic Province. Stream gradients along the main stem West Branch Susquehanna River in this lower portion of the watershed flatten out and average about 2 feet per mile. Valley portions are devoted mainly to agriculture.
In addition to the West Branch Susquehanna River, major tributary streams in the watershed include Clearfield Creek, Moshannon Creek, Bald Eagle Creek, Sinnemahoning Creek, Kettle Creek, Pine Creek, Lycoming Creek, Loyalsock Creek and Muncy Creek. There are only two major population centers in the watershed. Williamsport has a population of almost 30,000 and Lock Haven has a population of almost 10,000; both cities are located on the banks of the West Branch Susquehanna River. Most other towns in the watershed have populations less than 5,000 people, with many being located adjacent to tributary streams and the main stem West Branch Susquehanna River.
The four reservoir projects in the watershed are regulated as a system for flood risk management along the West Branch Susquehanna River. Taken together, these four projects have generated over $860 million in flood damage reduction benefits over the past 50 years. Each reservoir also provides water-oriented recreational features such as beaches, boat launches, fishing facilities, camping areas, and picnic zones that are managed by state and local sponsors. Portions of the West Branch Susquehanna watershed are degraded by acid mine drainage from abandoned coal mines, and the Curwensville and Sayers projects are occasionally regulated to mitigate the adverse effects of acid mine drainage along the West Branch Susquehanna River. In addition, Curwensville Lake provides 5240 acre-feet of dedicated water supply storage for downstream consumptive use make-up.

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USACE CWMS - West Branch Susquehanna
Created: June 25, 2018, 6:57 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - West Branch Susquehanna (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - West Branch Susquehanna Bank Lines
Created: June 25, 2018, 7:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - West Branch Susquehanna (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - West Branch Susquehanna Centerline
Created: June 25, 2018, 7:07 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - West Branch Susquehanna (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - West Branch Susquehanna Conversion Points
Created: June 25, 2018, 7:11 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - West Branch Susquehanna (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - West Branch Susquehanna Study Area
Created: June 25, 2018, 7:15 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - West Branch Susquehanna (Collection)

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Collection Resource Collection Resource
USACE CWMS - Muskingum Watershed
Created: June 25, 2018, 7:23 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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Composite Resource Composite Resource
USACE CWMS - Muskingum Watershed
Created: June 25, 2018, 7:38 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Muskingum Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Muskingum Watershed Bank Lines
Created: June 25, 2018, 7:56 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Muskingum Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Muskingum Watershed Centerline
Created: June 25, 2018, 8 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Muskingum Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Muskingum Watershed Study Area
Created: June 26, 2018, 12:25 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Muskingum Watershed (Collection)

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Collection Resource Collection Resource
USACE CWMS - Kaskaskia Watershed
Created: June 26, 2018, 12:36 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Kaskaskia River basin is the second largest basin in the state of Illinois, covering approximately 5,790 square miles. The headwaters are in the center of Champaign County, and the basin flows in a southwesterly direction. The basin drains to the Mississippi River, and the outlet is just upstream of the city of Chester, Illinois. The basin is roughly 175 miles long and has an average width of 33 miles. The Kaskaskia River has a very sinuous channel with low banks and a small slope. During times of heavy rains, the valleys in the basin can be subjected to serious flooding. The primary land use in the basin is agriculture. There are some urbanized areas in the watershed, including the St. Louis Metro East, Champaign, Vandalia, and other small towns spread throughout the basin.
There are two reservoirs constructed and operated by the US Army Corps of Engineers in the watershed: Lake Shelbyville and Carlyle Lake. Both dams are located on the main stem of the Kaskaskia River and are operated in tandem by the St. Louis District. The purpose of the reservoirs are to provide flood damage reduction, to create recreational opportunities, to augment water supply, to enhance water quality, to augment flows for navigation on the lower Kaskaskia River, and to provide fish and wildlife conservation. There is a Lock and Dam at the lower end of the Kaskaskia River, located approximately one mile upstream of the confluence with the Mississippi River. This structure provides sufficient depth for the navigation channel, which runs from the mouth to Fayetteville, Illinois, approximately 36 miles upstream. The Kaskaskia River was straightened and widened to provide for consistent navigation through this stretch. Upstream of Fayetteville the Kaskaskia River returns to its natural state.

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USACE CWMS - Kaskaskia Watershed
Created: June 26, 2018, 12:43 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Kaskaskia Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Kaskaskia Watershed Centerline
Created: June 26, 2018, 12:46 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Kaskaskia Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Kaskaskia Watershed Conversion Points
Created: June 26, 2018, 12:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Kaskaskia Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Kaskaskia Watershed Study Area
Created: June 26, 2018, 12:54 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Kaskaskia Watershed (Collection)

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Collection Resource Collection Resource
USACE CWMS - Yazoo Watershed
Created: June 26, 2018, 1:07 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Yazoo Basin is located in central and western Mississippi, encompassing approximately 13,500 square miles of drainage area (30% of the total area of the state of Mississippi). The authorized purpose of the four basin lakes is flood control. Other benefits are derived from the operation of the reservoirs, such as recreation, improved fish and wildlife habitat, and incidental navigation. The Flood Control Act of 15 June 1936 authorized the construction of the reservoirs within the Yazoo Basin. Construction began in the 1940’s and lasted through the 1950’s. All reservoirs were in operation by 1954.
There are two main topographic sections in the basin: the hill section and the delta section. The hill section above the lakes is fan shaped and is a rolling to hilly region with moderate variations on elevations. Soils in the uplands are composed chiefly of clays and loams and are moderately productive but subject to severe erosion. Alluvial soils in the stream valleys are fertile and generally cleared for cultivation. Vegetation in the hill section is characterized by hardwoods. The delta section is very flat and consists mainly of agricultural land.

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USACE CWMS - Yazoo Watershed
Created: June 26, 2018, 1:21 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Yazoo Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Yazoo Watershed Conversion Points
Created: June 26, 2018, 1:57 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Yazoo Watershed (Collection)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Yazoo Watershed Study Area
Created: June 26, 2018, 2 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Yazoo Watershed (Collection)

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USACE CWMS - Roanoke River Watershed
Created: June 26, 2018, 2:13 p.m.
Authors: Jessie Myers

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

Geography: The Roanoke River Basin is located in the southern part of Virginia and northern part of North Carolina. The river rises on the eastern slope of the Appalachian Mountains, flows 300 miles from Smith Mountain Dam in a southeasterly direction toward the Atlantic Coast, and empties into the Albemarle Sound, approximately 7 miles below Plymouth, NC. The basin is about 220 miles long and from 10 to 100 miles wide. Parts of 15 counties in Virginia and 17 counties in North Carolina are included in the watershed.

Drainage: The Roanoke River drains 9,580 square miles, of which 7,800 square miles is above John H Kerr Dam and 212 square miles is above Philpott Dam. The Dan River, the largest tributary, empties into the Roanoke at Clarksville, VA. Areas drained by the Dan and Upper Roanoke at this point are 3,855 and 3,465 square miles, respectively. As Williamston, NC, 38 miles above the mouth, the stream is affected by the elevation of the water in Albemarle Sound, which has no lunar tides, but whose surface is affected by wind.

Rainfall: The average annual precipitation over the entire basin is about 43 inches with annual extremes of 27 and 56 inches. Precipitation is well distributed throughout the year. The average annual snowfall is about 13 inches and does not accumulate sufficiently to have a noticeable effect on flood flows.

Storm rainfall characteristics: Flood producing storms in the Roanoke River Basin occur in all seasons of the year. Generally floods are caused by brief periods of intense rainfall on a major portion of the watershed. In the late summer and fall, intense rainfall is often associated with tropical hurricanes.

Runoff: The annual runoff from the Roanoke River Basin averages 14 inches or 32 percent of the annual precipitation. The runoff of the Roanoke River Basin, measured near Roanoke Rapids, NC, averages 1.0 cubic feet per second per square mile of watershed area.

Flood Damages: Floods in the Roanoke River Basin cause considerable loss to agricultural interests, urban areas, and to transportation and communication facilities. Although the damages occur throughout the watershed, the major flood losses are confined mainly to the Roanoke, Dan, and Smith Rivers. The flood plains in the Upper Roanoke River Valley and in the Dan and Smith River Valleys are usually narrow and flanked by bluffs which become precipitous in the headwater reaches. Damages from a major flood in these areas are not of major consequence to the agricultural areas are the farm enterprise is mainly situated above the flood plain and is not dependent for its continuity on the crops raised on the bottomlands. Below Weldon the floodplain is from 1 to 6 miles wide and contains about 78 percent of the total area and 61 percent of the agricultural area on the floodplains of the tree main rivers subject to inundation from floods. Practically all the farms in this valley are located on the wide flood plains and are completely inundated by a major flood. The majority of the cities and towns in the watershed are located on high ground.\

Location: John H Kerr Dam is located on the Roanoke River about 180 miles above the mouth, 20 miles downstream of Clarksville, VA, 18 miles upstream from the Virginia-North Carolina State line, and 80 miles southwest of Richmond, the capitol of Virginia.

Purpose: The objectives of regulating the outflow from John H Kerr dam will involve consideration of the following features: flood control, hydroelectric power, mosquito control, pollution abatement and fish and wildlife, navigation, and recreation. The primary objective of the project is flood control and a storage of 1,278,000 acre-feet between elevations 300 ft NGVD and 320 ft NGVD has been reserved exclusively for the detention storage of flood waters. The dam will also operate as a peaking plant. Most of the energy produced will be generated at varying rates during some portion of those hours designated as on-peak by the customers. The remainder of the energy produced will be generated incidental to reservoir regulation of flood flows.

Flow Forecasting: The main objective of forecasting stream flows into the reservoir is (a) to make an early determination of runoff in a flood rise so that releases from the reservoir can be established in accordance with the approval method of reservoir regulation and (b) to determine the amount of runoff assured in normal flows so that a forecast can be made of the water available for power generation.

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USACE CWMS - Willamette Watershed
Created: June 26, 2018, 2:17 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Willamette River, a major tributary of the Columbia River, is 187 miles long. Flowing northward between the Oregon Coast Range and Cascade Range, the river and its tributaries form a basin called the Willamette Valley. The valley, fed by rainfall on the western side of the Cascades, is one of the most fertile agriculture regions of the United States.
The main stem of the Willamette River is formed by the confluence of the Middle and Coast Forks of the Willamette River near Springfield, Oregon. The main stem flows north for 187 miles to the Columbia River. Significant tributaries of the Willamette River, from source to mouth, include the Middle and Coast Fork Willamette, the McKenzie, Long Tom, Marys, Calapooia, Santiam, Luckiamute, Yamhill, Molalla, Tualatin, and Clackamas rivers. The main stem of the Willamette River has an elevation of 438 feet at its headwaters and loses 428 feet in elevation between source and mouth or about 2.3 feet per mile. The gradient is slightly steeper from the source to Albany than from Albany to Oregon City. The main stem of the Willamette varies in width from about 330 to 660 feet. The average flow at the mouth is approximately 32,400 cubic feet per second and contributes 12 to 15 percent of the total flow of the Columbia River. The Willamette’s flow varies seasonally, averaging about 8,200 cfs in August to more than 79,000 cfs in December.
The Willamette River basin contains thirteen USACE dams. The primary purpose of these projects is to prevent flood damages to the downstream metropolitan areas of the Willamette Valley but other purposes include hydropower generation, fish and wildlife, water quality, recreational use and water supply. The regulation of flood and conservation storage in each reservoir is coordinated with the regulation of storage in all of the other reservoirs in the basin.
Communities along the main stem at risk of flooding include Springfield and Eugene in Lane County; Harrisburg in Linn County; Corvallis in Benton County; Albany in Linn and Benton Counties; Salem in Marion County; Newberg in Yamhill County; Oregon City, West Linn, Milwaukie, and Lake Oswego in Clackamas County, and Portland in Multnomah and Washington counties. The Willamette River is known for flooding because of the high amounts and variations of precipitation in the valley. The largest flood on the Willamette River, in recorded history, occurred in 1861 when rainstorms and warm temperatures combined with a well-above-average snowpack in the Cascades. From Eugene to Portland, thousands of acres of riverside farmland were washed away and many towns in the valley were damaged or destroyed. Peaking at 635,000 cubic feet per second, the 1861 flood inundated approximately 353,000 acres of land. Although the Willamette River is regulated and controlled by a complex system of dams, severe flooding is still a concern. In 1996, a low elevation snowpack combined with massive rainfall and warm temperatures, caused some of the costliest floods to ever affect the Willamette Valley.

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USACE CWMS - Willamette Watershed
Created: June 26, 2018, 2:26 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willamette Watershed (Collection)

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USACE CWMS - Willamette Watershed Centerline
Created: June 26, 2018, 2:30 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willamette Watershed (Collection)

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USACE CWMS - Willamette Watershed Centerline RAS
Created: June 26, 2018, 2:32 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willamette Watershed (Collection)

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USACE CWMS - Willamette Watershed Study Area
Created: June 26, 2018, 2:34 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willamette Watershed (Collection)

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USACE CWMS - Cumberland Watershed
Created: June 26, 2018, 2:45 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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USACE CWMS - Cumberland Watershed
Created: June 26, 2018, 2:51 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Cumberland Watershed (Collection)

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USACE CWMS - Cumberland Watershed XS
Created: June 26, 2018, 2:58 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Cumberland Watershed (Collection)

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USACE CWMS - San Joaquin Watershed
Created: June 26, 2018, 3:19 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

Other existing flood control improvements in addition to the major storage projects, have been constructed by the COE and local interests. These improvements include channelization, bypasses, storm drains, and levees along the banks of stream channels. There are also multiple headwater reservoirs controlled by different entitieis that can affect flood control in the major reservoirs.

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USACE CWMS - San Joaquin Watershed
Created: June 26, 2018, 3:30 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - San Joaquin Watershed (Collection)

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USACE CWMS - Roanoke River Watershed Bank Lines
Created: June 26, 2018, 3:33 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Roanoke River Watershed Collection Resource

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USACE CWMS - Roanoke River Watershed Centerline
Created: June 26, 2018, 3:39 p.m.
Authors: Jessie Myers

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USACE CWMS - Roanoke River Watershed Conversion Points
Created: June 26, 2018, 3:42 p.m.
Authors: Jessie Myers

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USACE CWMS - San Joaquin Watershed Bank Lines
Created: June 26, 2018, 3:43 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - San Joaquin Watershed (Collection)

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USACE CWMS - San Joaquin Watershed Centerline
Created: June 26, 2018, 3:46 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Roanoke River Watershed Gages Stage Flow
Created: June 26, 2018, 3:49 p.m.
Authors: Jessie Myers

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USACE CWMS - San Joaquin Watershed Conversion Points
Created: June 26, 2018, 3:50 p.m.
Authors: Mayss Saadoon

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USACE CWMS - San Joaquin Watershed Study Area
Created: June 26, 2018, 3:54 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Roanoke River Watershed Study Area
Created: June 26, 2018, 3:57 p.m.
Authors: Jessie Myers

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See USACE CWMS - Roanoke River Watershed Collection Resource

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ABSTRACT:

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USACE CWMS - Connecticut Watershed
Created: June 26, 2018, 4:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Connecticut River basin is the largest watershed in New England, extending from the northernmost part of New Hampshire to Long Island Sound. The watershed, which drains in a southerly direction, includes a small area of the Province of Quebec, and parts of New Hampshire, Vermont, Massachusetts, and Connecticut. Long and narrow in shape, it has a maximum length of about 280 miles and a maximum width of approximately 60 miles. The basin is bounded principally by the Androscoggin, Merrimack, and Thames River basins on the east and by the St. Lawrence, Hudson, and Housatonic River basins on the west.
Elevations range from sea level to over 5000 ft in the northern headwaters. Areas of well developed flood plains occur from Indian Stream in Pittsburgh, NH to Long Island Sound, the most extensive being in Massachusetts and Connecticut. The basin has a total drainage area of 11,250 square miles of which 114 mi2 are in Quebec, 3046 mi2 in New Hampshire, 3928 mi2 in Vermont, 2726 mi2 in Massachusetts, and 1436 mi2 in Connecticut.
The Connecticut River follows a general southerly course along the approximate centerline of its watershed for about 404 miles to its mouth on Long Island Sound at Saybrook, Connecticut. In the first 29 miles below its source, the river flows entirely within the State of New Hampshire, then for a distance of about 238 miles, between New Hampshire and Vermont, the western edge of the river forming the boundary; and finally across Massachusetts for 67 miles and Connecticut for 70 miles. The lower 60-mile reach of the river is tidal, with a mean tidal range during low river stages of 3.4 feet at the mouth, and about 1.2 feet at Hartford, 52 miles above the mouth. The fall in the river is about 2200 feet with the steepest portion averaging 30 feet per mile, occurring in the first 30 miles below the outlet of Third Connecticut Lake. From Wilder Dam, VT to the head of tidewater, 8 miles above Hartford, CT, the fall average about 2 ft per mile.
Wide and extensive flood plains are located at various reaches along the main stem. During major floods, these meadowlands become inundated to depths of 10 to 20 feet and act as large detention reservoirs which significantly reduce peak discharge at downstream locations. The most noteworthy are located in the following areas: the reach between West Stewartstown and Lancaster, NH; the 15-mile stretch between Woodsville, NH and Bradford, VT; in central Massachusetts between Montague City and Holyoke; and the extensive flood plains of Connecticut between Windsor Locks and Middletown.
There are important hydropower dams on the Connecticut River throughout its length. In the northern areas upstream of White River Junction are the Moore, Comerford, and Wilder projects; the Bellows Falls, Vernon, and Tuners Falls dams are located along the central reaches; and the Holyoke dam is in the southern portion of the basin.
The Connecticut River, in its southerly course to the ocean, is fed by numerous rivers and streams entering from the east and west. Rivers and streams on the western side of the basin are generally steeper and because the watersheds are steeper, flood runoff occurs more rapidly and peak contributions to Connecticut River flood flows have higher cfs/mi2 values than the eastern tributaries. The 15 largest tributaries, with watersheds larger than 200 mi2 and an aggregate area equal to 6517 mi2, or about 58 percent of the total basin area, include the Upper Amoonosuc River, Passumpsic River, Amoonosuc River, White River, Mascoma River, Ottauquechee River, Sugar River, Black River, West River, Ashuelot River, Millers River, Deerfield River, Chicopee River, Westfield River, and Farmington River.

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USACE CWMS - Roanoke River Watershed
Created: June 26, 2018, 4:09 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Roanoke River Watershed Collection Resource

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USACE CWMS - Connecticut Watershed Bank Lines
Created: June 26, 2018, 5:18 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Connecticut Watershed (Collection)

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USACE CWMS - Connecticut Watershed
Created: June 26, 2018, 5:13 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Connecticut Watershed Centerline
Created: June 26, 2018, 5:29 p.m.
Authors: Mayss Saadoon

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See USACE CWMS - Connecticut Watershed (Collection)

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USACE CWMS - Merrimack Watershed
Created: June 26, 2018, 5:46 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Merrimack River is formed by the confluence of the Pemigewasset and Winnipesaukee Rivers at Franklin, New Hampshire. Just south of this confluence, the steeper valley of the north gives way to a much wider, flatter flood plain, which, beginning in Concord, New Hampshire, is quite heavily developed. The river flows southerly through New Hampshire into Massachusetts, then just south of the state line, it turns abruptly northeastward joining the Atlantic Ocean near Newburyport, Massachusetts, 35 miles north of Boston.
The river has a total length of 116 miles, of which the lower 22 miles downstream of Haverhill are tidal. The total length of the Merrimack and Pemigewasset Rivers, the principal tributary, is approximately 186 miles. From its headwaters in the White Mountains to the ocean, the total fall of the river is 2,700 feet, with an overall average of 14.5 feet per mile. The fall in the Pemigewasset River from its source to its confluence with the Winnipesaukee River at Franklin is 2,450 feet, an average of 34.6 feet per mile. The Merrimack River from Franklin to the ocean falls only 50 feet, or an average of 1.3 feet per mile.
The northern tributaries of the Merrimack flow from the White Mountains and are generally short and steep with narrow valleys. The principal tributaries enter from the west. These rivers originate in hills from 1,000 to 1,200 feet in elevation and generally follow slow, meandering courses to the main river. The important southern tributaries, the Nashua and Concord Rivers, have flatter gradients and consequently, are more sluggish.

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USACE CWMS - Merrimack Watershed
Created: June 26, 2018, 6:27 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Merrimack Watershed Lidar Extent
Created: June 26, 2018, 6:34 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Merrimack Watershed Bank Lines
Created: June 26, 2018, 6:38 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Merrimack Watershed Collection Resource.

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USACE CWMS - Merrimack Watershed Centerline
Created: June 26, 2018, 6:40 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Merrimack Watershed Conversion Points
Created: June 26, 2018, 6:43 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Merrimack Watershed Study Area
Created: June 26, 2018, 6:46 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Neches Watershed
Created: June 26, 2018, 6:50 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Neches River begins in Van Zandt County approximately 60 miles southeast of Dallas, Texas, and flows in a southeasterly direction for approximately 416 miles to empty into Sabine Lake, 20 miles southeast of Beaumont, Texas. The Neches River and its principal tributary, the Angelina River, flow through areas of moderately hilly relief until the vicinity of Jasper and Woodville, where the terrain abruptly changes to the flat coastal prairie. The total drainage area of the Neches River basin is approximately 10,000 square miles.
Sam Rayburn Dam sits on the Angelina River within the Neches River basin in East Texas. The drainage area of the Angelina River is 3,556 square miles and has an overall length of 205 miles. The average slope of the streambed varies from 10.3 feet per mile at the headwaters to 1.1 foot per mile above Sam Rayburn Reservoir to 0.5 foot per mile in the pine flats between Sam Rayburn Dam and the Neches River. The Angelina River is located in the West Gulf Coast Plains region of timbered hills and Texas Pine flats. In the area of Sam Rayburn Dam, the Angelina River has cut a valley into the sediment deposits approximately 2,000 feet wide. Alluvial deposits are approximately 30 feet deep in the valley, consisting of layers of sand and silt. There are no large cities in the Angelina watershed. Sam Rayburn Dam is regulated for flood control to maintain flows at the downstream Control Point, Neches River at Evadale, below 20,000 cfs.
Town Bluff Dam, also known as Dam B and Steinhagen Lake, is located on the Neches River at river mile 113.7, about 12.4 miles downstream of its confluence with the Angelina River. The total drainage area above Town Bluff Dam is 7,585 square miles, which includes the entire Angelina River basin and 4,011 square miles of the Neches River basin. In the vicinity of the dam, the Neches River has a slope of approximately 0.7 feet per mile.
The Neches River has been improved for navigation as far upstream as Beaumont, and the basin is transversed by a network of highways and railroads. Numerous oil and gas fields are located within the basin, with a concentration of oil refineries and associated petroleum industries at Beaumont and Port Arthur. Over one half of the watershed area is classified as timber, and commercial timber is produced at lumber mills and manufacturing plants throughout the basin.

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USACE CWMS - Neches Watershed
Created: June 26, 2018, 6:59 p.m.
Authors: Mayss Saadoon

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See USACE CWMS - Neches Watershed Collection Resource

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USACE CWMS - Neches Watershed Centerline
Created: June 26, 2018, 7:05 p.m.
Authors: Mayss Saadoon

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See USACE CWMS - Neches Watershed Collection Resource

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USACE CWMS - Neches Watershed Conversion Points
Created: June 26, 2018, 7:15 p.m.
Authors: Mayss Saadoon

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See USACE CWMS - Neches Watershed Collection Resource

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USACE CWMS - Neches Watershed Study Area
Created: June 26, 2018, 7:21 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Guadalupe Watershed
Created: June 26, 2018, 7:41 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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USACE CWMS - Guadalupe Watershed
Created: June 26, 2018, 7:48 p.m.
Authors: Mayss Saadoon

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See USACE CWMS - Guadalupe Watershed Collection Resource

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USACE CWMS - Guadalupe Watershed Bank Lines
Created: June 26, 2018, 7:54 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Guadalupe Watershed Collection Resource

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USACE CWMS - Guadalupe Watershed Centerline
Created: June 26, 2018, 7:58 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Guadalupe Watershed Conversion Points
Created: June 26, 2018, 8:02 p.m.
Authors: Mayss Saadoon

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See USACE CWMS - Guadalupe Watershed Collection Resource

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USACE CWMS - Guadalupe Watershed Study Area
Created: June 26, 2018, 8:06 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Green Watershed
Created: June 26, 2018, 8:11 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Green River is a 384-mile-long (618 km) tributary of the Ohio River that rises in Lincoln County in south-central Kentucky. Tributaries of the Green River include the Barren River, the Nolin River, the Pond River and the Rough River. The upper portion of the basin is highly karstic which gives way to flat plains in the lower portion. Important for mining the lower portion of the Green River Basin remains open to barge navigation.

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USACE CWMS - Green Watershed
Created: June 26, 2018, 8:31 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Green Watershed Bank Lines
Created: June 26, 2018, 8:34 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Green Watershed Centerline
Created: June 26, 2018, 8:37 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Green Watershed Conversion Points
Created: June 26, 2018, 8:40 p.m.
Authors: Mayss Saadoon

ABSTRACT:

USACE CWMS - Green Watershed Collection Resource

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USACE CWMS - Green Watershed Study Area
Created: June 26, 2018, 8:42 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Ouachita Watershed
Created: June 27, 2018, 12:18 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Ouachita River rises in the Ouachita Mountains near Mena, Polk County, Arkansas, and flows southeasterly for about 605 miles through Arkansas and Louisiana. It flows into the Red River about 35 miles above the confluence with the Mississippi River. The Ouachita, Tensas, and Little Rivers form the Black River at Jonesville, LA 57 miles above its confluence with the Red River. The Ouachita River drains some 24,200 square miles, of which, 1,105 square miles are above Blakely Mountain Dam.
The Ouachita River basin may be divided into three topographic sections called mountain, hill, and delta. The mountain section comprises 15 percent of the total area and lies in the upper reaches of the Ouachita River and its tributaries. In this section the terrain is rugged, composed of parallel ridges separated by deep valleys with elevations ranging from 400 to 2,000 feet above mean sea level. The area is timbered, except in the narrow valleys which are farmed to a small extent. The mountainous section extends from the headwaters to about Malvern, AR which is about 334.4 miles above the mouth of the Black River. The hill section, which includes 55 percent of the total drainage area, extends along the main stream from Malvern, AR to Moro Bay, AR which is mile 229.6. This area is rolling and hilly except for the flat bottom land along the river. Below Moro Bay, the river enters the alluvial valley and traverses bottom lands dissected by numerous swamps, lakes, and bayous. The delta section includes the remaining 30 percent of the total Ouachita River drainage area. The Ouachita River below Columbia Lock and Dam (mile 117.8) lies in the Red-Ouachita backwater area. The principal Ouachita River tributaries, between Blakely Mountain Dam and Moro Bay, are Caddo River, drainage area 490 square miles, entering the river above Arkadelphia, AR, at mile 426; Little Missouri River, drainage area 2,080 square miles, entering between Arkadelphia and Camden, AR at mile 380; and Smackover Creek, drainage area 526 square miles, entering the river at mile 313. River slopes average 12 feet per mile in the first 80 miles from the source and 4 feet per mile in the next 80 miles, while from Malvern, AR to Moro Bay they decrease from 2.5 to 0.4 feet per mile. Channel dimensions vary from a trace at the source to widths of 300 feet near Malvern and 800 feet near Moro Bay with bank heights of 15 to 25 feet.

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USACE CWMS - Ouachita Watershed
Created: June 27, 2018, 12:27 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Ouachita Watershed Flood Inudation
Created: June 27, 2018, 12:35 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Ouachita Watershed Centerline
Created: June 27, 2018, 12:38 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Ouachita Watershed Collection Resource

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USACE CWMS - Ouachita Watershed Conversion Points
Created: June 27, 2018, 12:42 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Ouachita Watershed Collection Resource

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USACE CWMS - Ouachita Watershed Study Area
Created: June 27, 2018, 12:44 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Mill Creek Watershed
Created: June 27, 2018, 12:50 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Mill Creek area is characterized by wide seasonal variations in temperature and wide geographical variations in precipitation. Mill Creek Basin is in the belt of prevailing westerly winds and is largely under the influence of air from the Pacific Ocean. Occasionally, polar outbreaks of cold air spill over the Rocky Mountain barrier resulting in short periods of extremely low temperatures, but generally, winters are characteristically damp and foggy.
Mean annual precipitation for climate stations in the basin ranges from 17.8 inches at Walla Walla WB City, El. 948, in the lower portion of the basin, to 41.9 inches at Walla Walla 13 ESE, El. 2,400 (Refer to Tables 4-3 and 4-4). It is probable that at elevations above 5,000 feet, mean annual precipitation exceeds 50 inches. At Walla Walla, approximately 10 percent of the normal annual precipitation falls as snow; at higher elevations, this percentage is increased considerably, becoming approximately 40 percent at the 5,000-foot level. The normal annual precipitation for the basin is estimated to range from 35 to 40 inches above the project.
The general pattern of streamflow for Mill Creek consists of moderate to high flows from November through June and low flows from July through October. During years of low autumn precipitation and below normal winter temperatures, the period of low 4 - 9 flows may extend as late as February.
Major floods may be caused from any one of the following conditions: (1) intensive rainstorms, (2) a combination of rainfall and snowmelt, or (3) summer "cloudburst" thunderstorms. The winter flood period generally extends from December through February. Winter floods are flash-type floods that are relatively short in duration with peak discharges occurring in December through February. Historical floods of damaging magnitudes on Mill Creek have generally occurred in the winter and have been caused primarily by runoff from intense rainfall on snow with frozen ground or ground with a high soil moisture content. The spring snowmelt flood period generally extends from about the first of March through May. Peak discharges from snowmelt only runoff, rarely results in damaging stages. For the 1942-2005 period of record, the maximum mean daily discharge was 1,970 cfs on 23 December 1964 and the minimum mean daily discharge generally reaches zero in August. The largest historical flood outside of this period of record occurred on 1 April 1931 with an estimated peak discharge of 6,000 cfs.

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USACE CWMS - Mill Creek Watershed
Created: June 27, 2018, 12:56 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Mill Creek Watershed Bank Lines
Created: June 27, 2018, 1:05 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mill Creek Watershed Collection Resource

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USACE CWMS - Mill Creek Watershed Centerline
Created: June 27, 2018, 1:09 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mill Creek Watershed Collection Resource

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USACE CWMS - Mill Creek Watershed Conversion Points
Created: June 27, 2018, 1:12 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mill Creek Watershed Collection Resource

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USACE CWMS - Mill Creek Watershed Study Area
Created: June 27, 2018, 1:17 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Truckee Watershed
Created: June 27, 2018, 1:25 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The climate of the upper part of the Truckee River Basin is characterized by severe winters and short, mild summers. Precipitation is markedly less than on the western slopes of the Sierra Nevada. The climate of the lower portion of the basin is typical of the Great Basin. The winters are long but with deficient precipitation, and the summers are short with practically no precipitation. Normal annual precipitation over the drainage area between Lake Tahoe and Reno varies from 8 to 70 inches, with a basin mean of 26.5 inches. Precipitation usually falls as snow above elevation 5,000 feet, but some storms produce rain up to the highest elevations of the basin, and snowfall may occur anywhere in the basin. Precipitation in the headwater areas of the Truckee River Basin usually is associated with general storms which occur during the winter season of November through April. These storms originate over the Pacific Ocean and must cross the continuous barrier of the Sierra Nevada, which averages 8,000 feet in elevation, to reach these areas. Storm periods last from 1 to 4 days.

Major storms that have occurred over the Truckee River Basin since include those of December 1955, January 1963, and December 1964, February 1986, and January 1997. Local cloudbursts occur frequently during the summer. They usually occur in July and August when warm, mosit air is more likely to reach this area of Nevada from the Gulf of California. These storms are characterized by high intensities over small areas and can produce large flood flows on the smaller tributary streams but do not have a major impact on flow in the Truckee River. Most of the runoff from the Truckee River Basin occurs from November through July. In general, runoff from November through March results from rains that may extend to an elevation of 9,000 feet, and runoff from April through July usually results from snowmelt.
In the area between Lake Tahoe outlet and Reno, the flood plain consists of a comparatively narrow strip immediately adjacent to the stream, where damages are limited to railroad and highway facilities, diversion dams, canals and aqueducts and other types of public and private utilities. Some minor residential damage to cabins and summer homes has been experienced along the river principally between Lake Tahoe and Truckee.

The flood plain of the Truckee Riverr downstream of Vista consists prirnarily of agriculturral lands contiguous to the river channel. In the city of Reno and vicinity, the area subject to flooding include extensive and diversified property and improvements that are characteristic of the central portion of a prosperous urban development. In the Sparks-Truckee Meadow area considerable urban development and construction of light industry and warehousing has taken place. The Truckee River channel and overbank capacities through Reno are limited to a flow of 12,000 cfs in Reno and 6,000 cfs within Sparks. When these capacities are exceeded water leaves the overbank area and flows in a southeasterly direction eventually combining with other runoff in the Truckee Meadows area. Street and bridge elevations are approximately the same as the river bank elevations, and widespread flooding results when flood waters run overbank. The flood problem in Reno is further aggravated by floating debris which accompanies large floods.

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USACE CWMS - Truckee Watershed
Created: June 27, 2018, 1:42 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Truckee Watershed Bank Lines
Created: June 27, 2018, 1:47 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Truckee Watershed Collection Resource

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USACE CWMS - Truckee Watershed Centerline
Created: June 27, 2018, 1:50 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Truckee Watershed Conversion Points
Created: June 27, 2018, 1:53 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Truckee Watershed Study Area
Created: June 27, 2018, 1:56 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Santa Ana Watershed
Created: June 27, 2018, 2:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Santa Ana River Basin is located in Southern California and
has a drainage area totaling 2,460 square miles.. Of the total basin area, 2,255 square miles lie
upstream of Prado Dam, which is the primary flood risk management structure of the Santa Ana River.
The watershed spans mostly within the San Bernardino and Riverside Counties, and portions of Orange
and Los Angeles Counties.
Approximately 23 percent of the Santa Ana basin lies within the rugged San Gabriel and San Bernardino
Mountains, 9 percent within the San Jacinto Mountains, and 5 percent within the Santa Ana Mountains.
Most of the remaining area consists of lower-sloped valleys formed by a series of broad alluvial fan
surfaces which abut the base of the mountain front. Numerous low foothills rise above the alluvial fan
surfaces and include a range of hills north of the San Bernardino; the Crafton Hills east of Redlands; the
Jurupa Mountains north and west of Riverside; the Box Springs Mountains and the Badlands east of
Riverside; and the Chino and Peralta Hills northeast of Anaheim. In general, mountain ranges within the
basin are steep and sharply dissected. Maximum elevations in the Santa Ana basin reach 10,800 feet
NGVD at San Antonio Peak in the San Gabriel Mountains; 11,502 feet NGVD at San Gorgonio Mountain
in the San Bernardino Mountains; and 10,804 feet NGVD at Mount San Jacinto in the San Jacinto
Mountains. San Bernardino Mountains contain the headwaters of the Santa Ana River and two of its
principal tributaries, Bear and Mill Creeks. Lytle Creek, the largest tributary originating in the San Gabriel
Mountains, is in the northwest portion of the watershed. The San Jacinto River has its origin in the San
Jacinto Mountains southeast of Beaumont. The Santa Ana River has an average gradient of about 240
feet/mile in the mountains and about 20 feet/mile near Prado Dam. The average gradients of the principal
tributaries are approximately 700 feet/mile in the mountains and about 30 feet/mile in the valley areas.
The mountainous areas are expected to remain largely undeveloped during the entire project life. The
valley areas below Prado Dam are presently partially urbanized and are expected to approach complete
urbanization by the end of the project life.
The entire Santa Ana River Basin is underlain by a basement complex of crystalline metamorphic and
igneous rocks, which appear on the surface only in the most mountainous parts of the watershed. In the
foothills and valleys, the basement complex is overlain by a series of sandstones and shales.
Unconsolidated alluvial deposits range in depth from a few feet within the mountains to more than 1,000
feet on the alluvial fans in the valleys. The existence of several precipitous mountain scarps along the
upper boundaries of the watershed indicates that the area has been subjected to extensive folding and
faulting. The soils in the mountains, which are derived mainly from metamorphic and igneous rocks, are
shallow, poorly developed, and stony. On the lower slopes of the mountains and foothills, soils are mainly
loams and sandy loams, ranging from less than 1 foot to over 6 feet deep. In the valleys, where soils are
usually more than 6 feet deep, surface soils range from light, sandy alluvium to fine loams and silty clays
with heavier subsoils.
In general, the Santa Ana River Basin has a mild climate with warm, dry summers and cool, wet winters.
Both temperature and precipitation vary considerably with distance from the ocean, elevation, and
topography. At the city of Corona, about 26 miles from the ocean and 710 feet above sea level, the
average temperature is about 63 degrees Fahrenheit, with extremes of 22 degrees Fahrenheit and 118
degrees Fahrenheit recorded. At Squirrel Inn, located in the San Bernardino Mountains at an elevation of
5,700 feet NGVD, the average temperature is about 53 degrees Fahrenheit, with extremes of zero
degrees Fahrenheit and 97 degrees Fahrenheit recorded. Precipitation characteristically occurs in the
form of rainfall, although in the higher elevations some falls as snow. In general, the quantity of
precipitation increases with elevation. The 97-year mean seasonal precipitation for the basin, which
averages about 20 inches, varies from 10 inches south of the city of Riverside to about 45 inches in the
higher mountain areas. Nearly all precipitation occurs during the months of December through March.
Rainless periods of several months during the summer are common.

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USACE CWMS - Santa Ana Watershed
Created: June 27, 2018, 2:23 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Santa Ana Watershed Collection Resource

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USACE CWMS - Santa Ana Watershed Bank Lines
Created: June 27, 2018, 2:26 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Santa Ana Watershed Centerline
Created: June 27, 2018, 2:32 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Santa Ana Watershed Conversion Points
Created: June 27, 2018, 2:37 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Santa Ana Watershed Study Area
Created: June 27, 2018, 2:39 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - LACDA Watershed
Created: June 27, 2018, 2:48 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Los Angeles County Drainage Area (LACDA) is located in
Southern California and has a drainage area totaling 1,459 square miles. The watershed spans mostly
within the Los Angeles County, and extends to portions of San Bernardino and Orange Counties. The
watershed is abutted on the east by the Santa Ana River Basin, on the north by the Antelope Valley and
Santa Clara River Basins, and on the west by the Calleguas Creek Basin.
Elevations in the San Gabriel and Santa Susana Mountains, which form the northern boundary of the
watershed, vary from over 9000 feet in the east to 3000 feet in the west. The Santa Monica Mountains,
Montebello Hills, and Puente Hills separate the San Fernando and San Gabriel valleys from the coastal
plain, and their elevations range from 500 to 1500 feet.
Principal streams in LACDA are the Los Angeles River, (including the Rio Hondo above Whittier Narrows
Dam and its tributaries), and the San Gabriel River which have drainage areas of 824 and 635 square
miles at the mouth, respectively. The principal tributaries of the Los Angeles River include: Pacoima and
Tujunga Washes, both of which drain portions of the Santa Susana Mountains and the San Fernando
Valley; the Arroyo Seco, which starts in the San Gabriel Mountains and then heads south to the Los
Angeles River; and Compton Creek, which drains part of the coastal plain. The main channel of the Los
Angeles River is approximately 50 miles long and its tributaries have an aggregate length of about 225
miles. During periods of high runoff, the lower Rio Hondo Diversion Channel brings water from the San
Gabriel River system to the Los Angeles River, which could effectively increase the contributing drainage
area to the Los Angeles River during periods of high runoff. Principal tributaries of the San Gabriel River
include: Big and Little Dalton Wash, San Dimas Wash, and Walnut Creek, all of which drain portions of
the San Gabriel mountains and the San Gabriel Valley; San Jose Creek which drains the San Gabriel
Valley; and Brea Creek, Fullerton Creek, and Carbon Creek, which drain the coastal plain and are
tributary to the San Gabriel River via Coyote Creek. The San Gabriel River is approximately 58 miles long
and its tributaries in aggregate length total about 76 miles. The Rio Hondo, which is tributary to the Los
Angeles River, also connects with the San Gabriel River within in the Whittier Narrows Flood Control
Basin. While the Rio Hondo diverts much of the San Gabriel River runoff to the Los Angeles River, it also
drains the adjacent area to the north and northwest. The tributary area of the Rio Hondo is 137 square
miles or about 9 percent of the LACDA basin. Its length is approximately 20 miles and the aggregate
length of its tributaries is about 60 miles. The principal tributaries are Sawpit Wash, Santa Anita Wash,
Arcadia Wash, Eaton Wash, Rubio Wash, and Alhambra Wash. Stream slopes range from very steep in
the mountains, with slopes over 200 feet per mile common, to approximately 3 feet per mile in the coastal
plain.
In the mountains, runoff concentrates quickly from the steep slopes; hydrographs show that the stream
flow increases rapidly in response to effective rainfall. High rainfall rates, in combination with the effects of
shallow surface soils, impervious bedrock, fan-shaped stream systems, steep gradients, and occasional
denudation of the area by fire, result in intense debris-laden floods. These flood and debris-laden flows
are regulated at existing dams and debris basins.

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USACE CWMS - LACDA Watershed
Created: June 27, 2018, 3 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - LACDA Watershed Bank Lines
Created: June 27, 2018, 3:04 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - LACDA Watershed Centerline
Created: June 27, 2018, 3:09 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - LACDA Watershed Conversion Points
Created: June 27, 2018, 3:12 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - LACDA Watershed Study Area
Created: June 27, 2018, 3:14 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Arkansas (SWT) Watershed
Created: June 27, 2018, 3:48 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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Composite Resource Composite Resource
USACE CWMS - Arkansas (SWT) Watershed
Created: June 27, 2018, 4:06 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SWT) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SWT) Watershed Bank Lines
Created: June 27, 2018, 4:15 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SWT) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SWT) Watershed Centerline
Created: June 27, 2018, 4:19 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SWT) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SWT) Watershed Conversion Points
Created: June 27, 2018, 4:23 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SWT) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SWT) Watershed Study Area
Created: June 27, 2018, 4:25 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SWT) Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Pecos Watershed
Created: June 27, 2018, 4:30 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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USACE CWMS - Pecos Watershed
Created: June 27, 2018, 4:35 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Pecos Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Pecos Watershed Bank Lines
Created: June 27, 2018, 4:39 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Pecos Watershed Collection Resource

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USACE CWMS - Pecos Watershed Centerline
Created: June 27, 2018, 5:05 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Pecos Watershed Collection Resource

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USACE CWMS - Pecos Watershed Conversion Points
Created: June 27, 2018, 5:08 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Pecos Watershed Extract
Created: June 27, 2018, 5:13 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Pecos Watershed Study Area
Created: June 27, 2018, 5:18 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Pecos Watershed Collection Resource

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USACE CWMS - Pecos Watershed Study Area Geo
Created: June 27, 2018, 5:26 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Pecos Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Pecos Watershed Floodplain
Created: June 27, 2018, 5:31 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Pecos Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Arkansas (SPA) Watershed
Created: June 27, 2018, 5:37 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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Composite Resource Composite Resource
USACE CWMS - Arkansas (SPA) Watershed
Created: June 27, 2018, 5:45 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SPA) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SPA) Watershed Bank Lines
Created: June 27, 2018, 5:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SPA) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SPA) Watershed Centerline
Created: June 27, 2018, 5:57 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SPA) Watershed Collection Resource

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USACE CWMS - Arkansas (SPA) Watershed Centerline Cut
Created: June 27, 2018, 6:02 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SPA) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SPA) Watershed Conversion Points
Created: June 27, 2018, 6:05 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SPA) Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Arkansas (SPA) Watershed Study Area
Created: June 27, 2018, 6:07 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Arkansas (SPA) Watershed Collection Resource

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USACE CWMS - Housatonic Watershed
Created: June 27, 2018, 6:14 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Housatonic River Basin comprises an area of 1,949 square miles and is located in the western portion of Massachusetts and Connecticut and eastern New York. The basin is roughly elliptical in shape, oriented in a north – south direction with a maximum length and width of 98 and 35 miles, respectively. It is a hilly basin with forested uplands and cleared valleys. Elevations vary from mean sea level (msl) to 2,620 feet msl along the northern divide. There are numerous lakes and ponds scattered throughout the basin which have a modifying influence on minor floods, but generally have little effect on major floods. There is considerable valley storage on the main stem Housatonic River between Great Barrington and Falls Village, which has a significant effect in desynchronizing flood-flows from the upper watershed. The coordinated flood control plan for the basin, described in the Housatonic River Basin Master Manual of Water Control, includes seven dams and five local flood protection projects. Although the title Master Manual of Water Control is the Housatonic River Basin, all the flood control projects are located within the Naugatuck River watershed, the most significant tributary of the Housatonic River, having major damage centers with urban, highly developed areas. Of the seven dams, five are owned and operated by the Corps of Engineers and two are owned by the Connecticut Department of Environmental Protection (CT-DEP). The five Corps dams consists of three fully staffed dams with gated outlet works (Thomaston, Black Rock, and Hop Brook Dams), and two unstaffed with ungated, fixed opening outlet works, considered self-regulating (Hancock Brook and Northfield Brook Dams). The two dams owned by CT-DEP are also self-regulating dams (East Branch and Hall Meadow Dams). The Naugatuck River is the largest and most important watershed of the Housatonic River, and thus the CWMS modeling effort focused primarily on the Naugatuck River Watershed.

The general flow of the Naugatuck River Watershed is southerly through the communities of Torrington, Thomaston, Waterbury, Naugatuck, Beacon Falls, Seymour, and Ansonia to Derby where it discharges into the Housatonic River, 12 miles above its mouth. The watershed of the Naugatuck River is located primarily within the boundaries of Litchfield and New Haven Counties, with a small portion extending into Hartford County. The Naugatuck River watershed has a maximum length and width of approximately 50 and 12 miles respectively, and drainage area of 312 square miles. It has a rather uniform slope of about 14 feet per mile between the headwaters at Torrington and tidewater in Derby, Connecticut. The river valley is narrow with rocky hills rising on either side making it conducive to rapid runoff with little to no moderating effect on flood flows. Elevations vary from maximum of 1,625 feet msl on Dennis Hill in Norfolk along the northern divide to approximately 5 feet at the mouth. Its several relatively short and steep tributaries are conducive to rapid runoff. Major tributaries are the East and West Branches, Leadmine Brook, Branch Brook, Hancock Brook, Mad River, Meadow Brook, Little River, Bladdens River and Beaver Brook.

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USACE CWMS - Housatonic Watershed
Created: June 27, 2018, 6:21 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Housatonic Watershed Collection Resource

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USACE CWMS - Housatonic Watershed Bank Lines
Created: June 27, 2018, 6:26 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Housatonic Watershed Collection Resource

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USACE CWMS - Housatonic Watershed Centerline
Created: June 27, 2018, 6:29 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Housatonic Watershed Collection Resource

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USACE CWMS - Housatonic Watershed Study Area
Created: June 27, 2018, 6:33 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Housatonic Watershed Collection Resource

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USACE CWMS - Housatonic Watershed Streams
Created: June 27, 2018, 6:36 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Jackson James Watershed
Created: June 27, 2018, 6:39 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
Within the Jackson James River basin there is one USACE owned dam, Gathright Dam. The structure is located in Virginia on the Jackson River, about 43 miles upstream of the Jackson River’s confluence with Cowpasture River to form the James River. The city of Covington is about 19 miles downstream of the dam. This project is regulated to reduce flood damage downstream, to improve downstream water quality and for recreation. The reservoir has a catchment area of 345 square miles and a maximum capacity of approximately 505,000 acre-feet.
Upstream of Gathright there is a pump-back hydropower facility on Back Creek that is owned by Bath County and operated by Virginia Power. This facility has very limited flood storage and has minor impacts on inflow to the Gathright Reservoir. The only other major impounding structures in the Jackson James watershed are run of river low head dams used for water supply and power generation.
The Jackson and Cowpasture rivers confluence to form the James River just south of Iron Gate, VA. Notable tributaries on the James River upstream of Richmond are the Maury River, Buffalo River, Rockfish River, Hardware River, Slate River and Rivanna River. Some of the key gages in the basin include Jackson River below Gathright Dam near Hot Springs, VA (USGS Gage 02011800), James River at Buchanan, VA (USGS Gage 02019500), James River at Holcomb Rock, VA (USGS Gage 02025500), James River at Cartersville, VA (USGS Gage 02035000) and James River near Richmond, VA (USGS Gage 02037500).
The Jackson James River watershed begins in the Allegheny and Blue Ridge Mountains. This portion of the watershed is sparsely inhabited, forested and in mountainous terrain, characterized by parallel valleys and ridges. The River then flows east through the Piedmont region characterized by rolling hills to the flat Coastal Plain eventually discharging into Chesapeake Bay.
Average annual precipitation in Richmond, VA is along the lines of 44 inches with the wettest parts of the year in July and August.
Tidal influence on the James River occurs just east of Richmond, VA.

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USACE CWMS - Jackson James Watershed
Created: June 27, 2018, 6:51 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Jackson James Watershed Collection Resource

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USACE CWMS - Jackson James Watershed Bank Lines
Created: June 27, 2018, 6:55 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Jackson James Watershed Collection Resource

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USACE CWMS - Jackson James Watershed Cavi Zones
Created: June 27, 2018, 6:57 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Jackson James Watershed Collection Resource

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USACE CWMS - Jackson James Watershed Centerline
Created: June 27, 2018, 7 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Jackson James Watershed Collection Resource

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USACE CWMS - Jackson James Watershed Conversion Points
Created: June 27, 2018, 7:02 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Jackson James Watershed Collection Resource

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USACE CWMS - Jackson James Watershed Study Area
Created: June 27, 2018, 7:04 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Jackson James Watershed Collection Resource

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Composite Resource Composite Resource
USACE CWMS - ACF Watershed
Created: June 27, 2018, 7:37 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - ACF Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - ACF Watershed Bank Lines
Created: June 27, 2018, 7:41 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - ACF Watershed Collection Resource

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USACE CWMS - ACF Watershed Centerlines
Created: June 27, 2018, 7:43 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - ACF Watershed Collection Resource

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USACE CWMS - ACF Watershed Study Area
Created: June 27, 2018, 7:49 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - ACF Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - ACF Watershed Conversion Points
Created: June 27, 2018, 7:46 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - ACF Watershed Collection Resource

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USACE CWMS - ACT Watershed
Created: June 27, 2018, 7:55 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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USACE CWMS - ACT Watershed
Created: June 27, 2018, 8:12 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - ACT Watershed Collection Resource

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USACE CWMS - ACT Watershed Bank Lines
Created: June 27, 2018, 8:14 p.m.
Authors: Mayss Saadoon

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USACE CWMS - ACT Watershed Centerlines
Created: June 27, 2018, 8:19 p.m.
Authors: Mayss Saadoon

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USACE CWMS - ACT Watershed Conversion Points
Created: June 27, 2018, 8:23 p.m.
Authors: Mayss Saadoon

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USACE CWMS - ACT Watershed Study Area
Created: June 27, 2018, 8:26 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed
Created: June 28, 2018, 12:21 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Thames River Basin is located within the states of
Connecticut, Massachusetts and Rhode Island. Of the 1,474 square miles that make up the basin, 1,162
square miles, or 79% of the basin, extends into Connecticut. About 17% of the basin is located in
Massachusetts and the remaining 4% in Rhode Island. The basin is characterized by a hilly terrain
comprised of lakes, ponds and several reservoirs. Elevations within the Thames River Basin range from
600 feet to about 1200 feet above mean sea level in the northwest.
The coastal location of the Thames River basin exposes it to the effects of cyclonic disturbances and
coastal storms in the region, resulting in periods of heavy precipitation. On an average, this basin
receives approximately 46 inches of precipitation annually. The average annual snowfall in Groton,
Connecticut is about 25 inches, which is representative of the coastal regions of the Thames River
Basin. Within the upper Quinebaug River watershed, the average annual snowfall ranges from 54 to 65
inches.
The Thames River basin derives its name from Thames River, which is a 15 mile long tidal estuary
extending from the confluence of the Shetucket and Yantic Rivers near Norwich, CT to Long Island
Sound at New London, CT. Some of its major tributaries include the French River, Quinebaug River,
Yantic River, Shetucket River, Willimantic River, Natchaug River and Mt. Hope River. Of these, the
Quinebaug and French Rivers have their origins in Massachusetts.
The key inflow gages in the Thames River basin include Yantic River at Yantic, Natchaug River at
Willimantic, Shetucket River Near Willimantic, Little River Near Oxford, French River Below Dam at
Hodges Village and Quinebaug River Below East Brimfield Dam At Fiskdale.
There are six USACE dams located within the Thames River Basin. They include the Mansfield Hollow
Dam on the Natchaug River, Buffumville Dam on Little River, Hodges Village Dam on French River and
East Brimfield Dam, Westville Dam and West Thompson Dam on Quinebaug River. Mansfield Hollow
Dam primarily serves the purpose of flood protection for the community of Willimantic located
immediately below the dam. Similarly, other dams primarily provide flood protection to downstream
communities – Buffumville Lake and Hodges Village dams to the town of Oxford, East Brimfield Dam to
the town of Sturbridge, Westville Dam to the town of Southbridge and West Thompson Dam to the town
of Putnam.
The Thames River basin is one of the most rural basins in the New England Region, with majority of the
land use characterized by agriculture, forest land and open space. Dairy, poultry operations and truck
farming form the major agriculture businesses. Major manufacturing industries within the basin include
textiles, lumber, machinery and fabricated metals. While wholesale and retail trade industries have seen
an increase in employment in recent years, agriculture, forestry and fisheries have continued to decline
steadily.

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USACE CWMS - Thames Watershed
Created: June 28, 2018, 12:45 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Thames Watershed Cavi Zones
Created: June 28, 2018, 12:50 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Thames Watershed Centerlines
Created: June 28, 2018, 12:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Thames Watershed Conversion Points
Created: June 28, 2018, 12:56 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Thames Watershed Computational Points
Created: June 28, 2018, 12:58 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed Rivers
Created: June 28, 2018, 1:02 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed Sub-basins
Created: June 28, 2018, 1:06 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed
Created: June 28, 2018, 1:09 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed Storage Areas
Created: June 28, 2018, 1:12 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed Sections
Created: June 28, 2018, 1:17 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Thames Watershed Study Area
Created: June 28, 2018, 1:32 p.m.
Authors: Mayss Saadoon

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USACE CWMS - Cape Fear Watershed
Created: June 28, 2018, 1:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Cape Fear watershed headwaters are in the Piedmont geographic region characterized by relatively low, rolling hills extending into the Upper Coastal and Lower Coastal plains characterized predominantly by wetlands in the middle to southeast portions of the watershed. Elevations range from 900 feet in the western hills to sea level at the mouth of the Cape Fear River in Wilmington. Average annual precipitation in the Cape Fear watershed ranges from 42 inches in Greensboro near the head waters to 57 inches in Wilmington on the coast. The Greensboro area average annual snowfall of 9 inches. However, runoff due to snowmelt is generally not a concern in this watershed.

Within the Cape Fear basin, there is one USACE reservoir project. The project is the B. Everett Jordan Dam and Lake on the Haw River approximately 4 miles upstream of the confluence of the Deep River which creates the Cape Fear River. The project purposes include flood control, water supply, recreation, fish and wildlife enhancement, and augmentation of low flows for the purposes of pollution abatement and water-quality control in the Cape Fear River Basin.

Other locks and dams on the Cape Fear River include Buckhorn Lake Dam, Huske Lock and Dam, Lock and Dam #1 and Lock and Dam #2. Buckhorn Lake Dam creates a backwater effect at the tailrace of the B. Everett Jordan Dam. The Shearon Harris Lake Dam is located on Buckhorn Creek and serves the Shearon Harris Nuclear Power Plant, Unit 1 located in New Hill, NC. The plant is operated by Carolina Power & Light Company.

A few of the notable tributaries to the Cape Fear River include Turnbull Creek, Harrisons Creek, Rockfish
Creek, Little River, Upper Little River, Buckhorn Creek, Deep River and Haw River. Tributaries to the Haw River upstream of the B. Everett Jordan Dam include New Hope River, Cane Creek, Big Alamance Creek, Back Creek, Stony Creek, and Reedy Fork.

The key inflow gages in the basin include Haw River at Haw River, Haw River near Bynum, Morgan
Creek near Chapel Hill and New Hope Creek near Blands. Key gages downstream of B. Everett Jordan Dam are Deep River at Moncure, Cape Fear River at Lillington and Cape Fear River at Fayetteville.

During flood control operations, the primary objective of B. Everett Jordan reservoir is to control floods along the Cape Fear River, particularly in the vicinity of Fayetteville. The basic plan of operation is to maintain a normal pool elevation of 216 feet, mean sea level (msl), by releasing inflows up to nondamage stages in the downstream reaches of the river. The non-damage stage at Fayetteville is 31 feet at the river gage. The effects of runoff from uncontrolled drainage areas on Fayetteville stages is forecast by monitoring flows at the Deep River at Moncure gage, the Cape Fear River at Lillington gage and the Cape Fear River at Fayetteville gage. Flows from the Deep River are particularly significant.

An objective of water quality control at B. Everett Jordan Lake is meeting the North Carolina and Environmental Protection Agency (EPA) standards for both the impounded water and the river water below the dam. For low flow regulation, 94,600 acre-feet (67%) of water quality storage is reserved in the conservation pool of Jordan Lake for release during critically dry periods. 45,800 acre-feet (33%) of the conservation pool storage is reserved for water quality. A required minimum instantaneous flow of 40 cfs is maintained immediately below the dam. Releases are made from the conservation pool storage allocated to water quality as necessary to maintain a minimum of 600 cfs as measured at the Lillington stream gage. Occasionally, the flow at Lillington may drop below 600 cfs because of variations in river flows induced by small hydroelectric plants located on the Deep River.

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USACE CWMS - Cape Fear Watershed
Created: June 28, 2018, 2:59 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Cape Fear Watershed Bank Lines
Created: June 28, 2018, 3:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Cape Fear Watershed Cavi Zones
Created: June 28, 2018, 3:06 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Cape Fear Watershed Centerline
Created: June 28, 2018, 3:08 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Cape Fear Watershed Conversion Points
Created: June 28, 2018, 3:11 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Cape Fear Watershed Collection Resource

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USACE CWMS - Cape Fear Watershed Study Area
Created: June 28, 2018, 3:13 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Cape Fear Watershed Collection Resource

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USACE CWMS - Yadkin Watershed
Created: June 28, 2018, 3:20 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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USACE CWMS - Yadkin Watershed
Created: June 28, 2018, 3:24 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Yakdin Watershed Collection Resource

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USACE CWMS - Yadkin Watershed Bank Lines
Created: June 28, 2018, 3:43 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Yadkin Watershed Centerline
Created: June 28, 2018, 3:48 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Yadkin Watershed Conversion Points
Created: June 28, 2018, 3:50 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Yadkin Watershed Study Area
Created: June 28, 2018, 3:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Yakdin Watershed Collection Watershed

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USACE CWMS - Mississippi River Watershed MVP
Created: June 29, 2018, 12:54 p.m.
Authors: Jessie Myers

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

About 1,100 air miles north of the Gulf of Mexico at an elevation of 1,465 feet above sea level, the outlet of Lake Itaska in north central Minnesota is the origin of the Mississippi River, and the river flows almost 2,400 twisting and turning miles to the Gulf. The Mississippi River starts its journey flowing north, then east, and then in a great sweeping arc turns back to the southwest to Brainerd, Minnesota where the river begins flowing to the south and southeast. The headwaters of the Mississippi River is a region of dense forests, great swamps, and thousands of lakes. Below the Twin Cities, where the Mississippi River is joined by its largest tributary in the St. Paul District, the Minnesota River, the flow is through a valley from one to three miles wide between bluffs which are 200 to 600 feet high. A short distance below St. Paul, the Mississippi River is joined by another large tributary, the St. Croix River. Below Red Wing, Minnesota, the river enters Lake Pepin which was formed by the delta of the Chippewa River, and near the southern limit of the St. Paul District, the Wisconsin River empties into the Mississippi River.

In the St. Paul District, the Mississippi River and its tributaries drain an area of almost 80,000 square miles, of which 45,000 square miles are in Minnesota, 32,000 square miles are in Wisconsin, and the remainder are in South Dakota and Iowa. In this district, the Mississippi River drops almost 60% of its total fall. In the northwestern portion of the State of Minnesota, channels of streams have flat gradients and meander through shallow valleys. In north central Minnesota with its heavy forest cover, flat land slopes, and large storage capacity in lakes, swamps, and reservoirs, there is no serious flood problem. However, in the southeastern part of the State, the tributaries, flowing from the prairies to the main stream, have cut deep gorges through the soft limestones and sandstones which form the bedrock in this area. The relatively high rainfall, averaging up to 32 inches per year combined with the steep gradient of the channels, cause these streams to have occasional flash floods. Soil erosion, silting, large discharges, and high velocity may cause serious problems.

The portion of the watershed modeled by this effort extends from the Twin Cities (Minneapolis – St. Paul metropolitan area) to Guttenberg, IA near Lock and Dam 10. This includes the St. Croix River, Chippewa River, and Wisconsin River. Modeling of the Minnesota River is being completed under a separate CWMS basin modeling effort in FY16.

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USACE CWMS - Mississippi River Watershed MVP
Created: June 29, 2018, 12:56 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVP Collection Resource

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USACE CWMS - Mississippi River Watershed MVP
Created: June 29, 2018, 1:01 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVP Collection Resource

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USACE CWMS - Mississippi River Watershed MVP Centerline
Created: June 29, 2018, 1:02 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVP Collection Resource

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ABSTRACT:

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USACE CWMS - Mississippi River Watershed MVP Study Area
Created: June 29, 2018, 1:02 p.m.
Authors: Jessie Myers

ABSTRACT:

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USACE CWMS - Mississippi River Watershed MVR
Created: June 29, 2018, 1:13 p.m.
Authors: Jessie Myers

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Mississippi River Basin is the largest river system in the United States, covering approximately 1.15 million square miles, or over 40% of the area of the Continental U.S. Several large tributary rivers flow into the Mississippi, including the Missouri, Ohio, and Arkansas Rivers. Maximum topographic relief varies from approximately 1,475 feet near the headwaters at Lake Itasca to 0 feet at the Gulf of Mexico.
The scope of this project focuses on the Upper Mississippi River (UMR) and delineation of the watershed will be the responsibility of MVP, MVR, and MVS respectively. For the most part, the modeling extents will be divided along district boundaries. However due to hydraulic complications, flood fight activities, and general operations, the area between L/D22 and L/D 24 on the Mississippi and around La Grange L/D on the Illinois will be modeled by both MVS and MVR. The Common Computation Points (CCP’s) for data hand off between districts will be L/D 10 for MVP to MVR and L/D 22 and La Grange L/D for MVR to MVS.

In the Rock Island District, the Mississippi River and its tributaries drain an area of almost 84,500 square miles, however only about 28,900 square miles will be modeled for this project. The remaining areas of the watershed (the Des Moines River basin, the Iowa and Cedar River basin, and the Illinois Waterway) have already been modeled, are in the process of being modeled, or are scheduled to be modeled next year. Most of the watershed is located within Iowa and Illinois with additional contribution areas from Minnesota, Wisconsin, and Missouri. Throughout a majority of the district, the typical floodway ranges between ½ mile to about 1½ miles and is flanked on either side by vast floodplains (up to 10 miles wide) extending to the bluffs. In most areas, a majority of the floodplain has been constricted with agricultural levees and urban development. A prime example of this constriction is located in the Quad Cities downstream of L/D 15 and another one is located just upstream of Hannibal, MO. The extensive system of levees and floodwalls in this section of the Mississippi River will make modeling difficult, especially when the full scope of flood fight activities of this region are taken into account.

From the district boundaries, the basin is roughly 315 miles long and has a maximum width of about 400 miles. The Mississippi River has a mildly sinuous channel with low banks and a small slope. During times of heavy rains, the valleys in the basin can be subjected to serious flooding as was seen in the 1993 and 2008 floods of record. The primary land use in the basin is agriculture. The largest urbanized areas in the watershed (population over 10,000), include Dubuque (IA), Clinton (IA), the Quad Cities Metro Area (IA-IL), Muscatine (IA), Burlington (IA), Fort Madison (IA), Keokuk (IA), Quincy (IL), and Hannibal (MO). There are also several other small towns located along the banks of the Mississippi River and spread along its tributaries throughout the basin.

There are 12 navigation dams located within this section of river that are operated by the Rock Island District. The primary purpose of these locks and dams is to facilitate travel and trade along the river and throughout the Midwest. The dams are primarily used to controlling the water levels during low flow conditions and have a negligible impact in providing flood damage reduction.

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USACE CWMS - Mississippi River Watershed MVR
Created: June 29, 2018, 1:19 p.m.
Authors: Jessie Myers

ABSTRACT:

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USACE CWMS - Mississippi River Watershed MVR Bank Lines
Created: June 29, 2018, 1:20 p.m.
Authors: Jessie Myers

ABSTRACT:

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ABSTRACT:

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USACE CWMS - Mississippi River Watershed MVR Centerline
Created: June 29, 2018, 1:21 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVR Collection Resource

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USACE CWMS - Mississippi River Watershed MVS
Created: June 29, 2018, 1:43 p.m.
Authors: Jessie Myers

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Mississippi River Basin is the largest river system in the United States, covering approximately 1.15 million square miles, or over 40% of the area of the Continental U.S. Several large tributary rivers flow into the Mississippi, including the Missouri, Ohio, and Arkansas Rivers. Maximum topographic relief varies from approximately 1,475 feet near the headwaters at Lake Itaska to 0 feet at the Gulf of Mexico. The portion of the Mississippi River Basin that is covered in this CWMS project drains approximately 15,475 square miles.

The Mississippi River in the St. Louis District covers a centerline distance of about 300 miles, flowing generally from the northwest to southeast, from Lock and Dam #22 in Saverton, MO to the mouth of the Ohio River near Cairo, IL. The topography of the basin is characterized by hilly upland terrain and broad, flat floodplain area near the main stem of the river, although there are some areas with steep bluffs above the channel banks. The Mississippi River channel invert ranges in elevation (within the St. Louis District) from about 430 feet at Lock and Dam 22 to about 250 feet at the confluence with the Ohio River. The typical estimated Mississippi River channel invert slope in the District is 0.5 feet per mile. Within the St. Louis District, the main tributaries are the Salt, Cuivre, Illinois, Missouri, Meramec, Kaskaskia, Big Muddy, Castor, and Cache Rivers.

Soils in the basin were predominantly deposited by the succession of continental glaciers that advanced and retreated across the area during the Great Ice Age. These sediments fall into three major categories: till, lacustrine deposits, and outwash sediments. Loess soils can also be found within the basin. In general, the soils in the basin are rich in organic matter and help explain the major land use categories: agriculture and forested areas. The climate for the basin is considered moderate and is characterized by hot summers and cool winters. The basin lies within the humid continental climate, and the area experiences four distinct seasons. Average annual rainfall is approximately 45 inches across the basin, and typically the maximum precipitation occurs in the spring (April, May, and June) and again in late November.

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USACE CWMS - Mississippi River Watershed MVS Bank Lines
Created: June 29, 2018, 1:44 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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USACE CWMS - Mississippi River Watershed MVS Centerline
Created: June 29, 2018, 1:44 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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ABSTRACT:

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USACE CWMS - Mississippi River Watershed MVS Study Area
Created: June 29, 2018, 1:45 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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USACE CWMS - Mississippi River Watershed MVS
Created: June 29, 2018, 1:45 p.m.
Authors: Jessie Myers

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USACE CWMS - Chehalis Watershed
Created: June 29, 2018, 3:47 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)
The Wynoochee River basin is 195 square miles and located on the Olympic Peninsula in the State of Washington. It is one of several tributaries feeding the Chehalis River before it drains at the mouth of Grays Harbor. The basin extends about 40 miles in the north-south direction and about 5 miles in the east-west direction.
The Wynoochee River flows 68 miles from its headwaters on the southern slopes of the Olympic Mountains to the Chehalis River. For the first 8 miles, Wynoochee River drops in elevation from nearly 5,000 feet to 1,000 feet then flows 16 miles through a forested valley known as the Weatherwax basin. Wynoochee Dam is located midway through the Weatherwax basin and regulates flows from about one quarter of the drainage area above the control point, Wynoochee River above Black Creek. USACE is authorized to use flood control storage in the reservoir at Wynoochee Dam.
Below the Weatherwax basin the river travels 4 miles through a twisting canyon, then winds 13 miles among gravel bars confined by steep valley slopes. The lower 27 miles of the river meanders through pastures and hayfields. Upstream of the dam tributaries are small. Downstream, the larger tributaries are Big Creek (9.7 square miles), Schafer Creek (12.9 square miles), and Black Creek (25.1 square miles).
The upper basin has rugged mountains and is not populated. The lower basin is primarily agricultural and is sparsely populated with houses and barns. The City of Montesano (population 4,000), is the only city within the basin and has the largest potential for economic damages or threat to life safety in a large flood event.
The agricultural area of the Wynoochee valley consists of 3,980 acres in the flood plain along the lower 27 miles of the river. These bottom lands are among the most productive of Grays Harbor County. Cultivated land is used for feed crops, primarily hay and silage, with clover and timothy hay the most common types. There are few major developments along the river. The city of Aberdeen has an industrial water intake at RM 8.1; there is a commercial gravel pit operation at RM 3.2; US Highway 410 crosses at RM 2.7; and the North Pacific Railroad crosses at RM 1.6.

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USACE CWMS - Chehalis Watershed
Created: June 29, 2018, 3:55 p.m.
Authors: Mayss Saadoon

ABSTRACT:

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USACE CWMS - Chehalis Watershed Bank Lines
Created: June 29, 2018, 3:57 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Chehalis Watershed Collection Resource

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USACE CWMS - Chehalis Watershed Centerline
Created: June 29, 2018, 4 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Chehalis Watershed Collection Resource

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USACE CWMS - Chehalis Watershed Conversion Points
Created: June 29, 2018, 4:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Chehalis Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Chehalis Watershed Study Area
Created: June 29, 2018, 4:06 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Chehalis Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Scioto Watershed
Created: July 3, 2018, 5:12 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Scioto Watershed Bank Lines
Created: July 3, 2018, 5:26 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Scioto Watershed Collection Resource

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Composite Resource Composite Resource
USACE CWMS - Scioto Watershed
Created: July 3, 2018, 5:27 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Scioto Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Scioto Watershed Centerlines
Created: July 3, 2018, 5:30 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Scioto Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Scioto Watershed Conversion Points
Created: July 3, 2018, 5:33 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Scioto Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Scioto Watershed Study Area
Created: July 3, 2018, 5:35 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Scioto Watershed Collection Watershed

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Collection Resource Collection Resource
USACE CWMS - Little River Watershed
Created: July 10, 2018, 12:37 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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Composite Resource Composite Resource
USACE CWMS - Little River Watershed
Created: July 10, 2018, 12:51 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Little River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Little River Watershed
Created: July 10, 2018, 12:55 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Little River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Little River Watershed Centerline
Created: July 10, 2018, 12:59 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Little River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Little River Watershed Study Area
Created: July 10, 2018, 1:06 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Little River Watershed Collection Resource

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Composite Resource Composite Resource
USACE CWMS - Willow Creek NWW Watershed
Created: July 10, 2018, 1:28 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willow Creek NWW Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Willow Creek NWW Watershed Bank Lines
Created: July 10, 2018, 1:34 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willow Creek NWW Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Willow Creek NWW Watershed Centerline
Created: July 10, 2018, 1:45 p.m.
Authors: Mayss Saadoon

ABSTRACT:

USACE CWMS - Willow Creek NWW Watershed Resource Collection

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ABSTRACT:

See USACE CWMS - Willow Creek NWW Watershed Collection Resource

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USACE CWMS - Willow Creek NWW Watershed Study Area
Created: July 10, 2018, 1:51 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Willow Creek NWW Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Willow Creek NWW Watershed
Created: July 10, 2018, 1:56 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

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Composite Resource Composite Resource
USACE CWMS - Big Sandy River Watershed
Created: July 10, 2018, 7:35 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Big Sandy River Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Big Sandy River Watershed Bank Lines
Created: July 10, 2018, 7:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Big Sandy River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Big Sandy River Watershed Centerline
Created: July 10, 2018, 7:55 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Big Sandy River Watershed Collection Resource

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USACE CWMS - Big Sandy River Watershed Conversion Points
Created: July 10, 2018, 8:02 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Big Sandy River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Big Sandy River Watershed Study Area
Created: July 10, 2018, 8:02 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Big Sandy River Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Delaware River Watershed
Created: July 10, 2018, 8:12 p.m.
Authors: Jessie Myers · Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Delaware River is the longest un-dammed river east of the Mississippi River, extending 330 miles from the Catskill Mountains in New York to the mouth of the Delaware Bay where it flows into the Atlantic Ocean. The river is fed by 216 substantial tributaries, the largest of which are the Schuylkill and Lehigh Rivers in Pennsylvania. The watershed drains four-tenths of one percent of the total continental U.S. land area. In all, the basin contains 13,539 square miles draining the four states of New York, Pennsylvania, New Jersey, and Delaware.

Parts of five physiographic provinces lie within the Delaware River Basin. These are the Coastal Plain, Piedmont, New England, Valley and Ridge, and Appalachian Plateaus. Topography varies from the relatively flat Coastal Plain, which consists of unconsolidated sediments, to rolling lowlands and a series of broad uplands in the Piedmont. North of the Piedmont Province, the New England and the Valley and Ridge Provinces consist of rock layers that have been deformed into a series of steep ridges and parallel folds that trend northeast-southwest. The Appalachian Plateaus occupy the upper one-third of the basin and are characterized by rugged hills with intricately dissected plateaus and broad ridges. Altitude in the basin increases from sea level in the south to more than 4,000 feet in the north. During the last major glacial advance, the Appalachian Plateaus and parts of the Valley and Ridge and the New England Provinces were glaciated. North of the line of glaciation, valleys typically are underlain by thick layers of stratified drift and till.

Average annual precipitation ranges from 42 inches in southern New Jersey to about 50 inches in the Catskill Mountains of southern New York; annual snowfall ranges from 13 inches in southern New Jersey to about 80 inches in the Catskill Mountains. Generally, precipitation is evenly distributed throughout the year. Annual average temperatures range from 56 degrees Fahrenheit in Southern New Jersey to 45 degrees Fahrenheit in Southern New York.

Approximately five percent of the nation’s population (15 million people) relies on the waters of the Delaware River Basin for drinking and industrial use. The Catskill Mountain Region in the upper basin provides New York City (NYC) with a high quality source of water from three basin reservoirs, Cannonsville, Pepacton, and Neversink. Nearly half of its municipal water supply comes from these reservoirs that is diverted from the Delaware River Watershed. Within the basin, the river supplies drinking water to much of the Philadelphia metropolitan area and major portions of New Jersey, both within and outside of the basin.

From the Delaware River’s headwater in New York to the Delaware Estuary and Bay, the river also serves as an ecological and recreational resource. Over the past half century, as a result of the maintenance of minimum flow targets at Montague and Trenton, NJ, cold-water fisheries have been established in the East Branch Delaware, West Branch Delaware, Nerversink River and the upper main-stem Delaware River. Most of the main-stem upstream of Trenton, NJ has been designated by Congress as part of the Federal Wild and Scenic River System.

There are numerous economic benefits from the river. The Delaware River Port Complex (including docking facilities in Pennsylvania, New Jersey, and Delaware) is the largest freshwater port in the world. According to testimony submitted to a U.S. House of Representatives subcommittee in 2005, the port complex generates $19 billion in annual economic activity. It is one of only 14 strategic ports in the nation transporting military supplies and equipment by vessel to support troops overseas. The Delaware River and Bay is home to the third largest petrochemical port, as well as five of the largest east coast refineries. Nearly 42 million gallons of crude oil are moved on the Delaware River on a daily basis. There are approximately 3,000 deep draft vessel arrivals each year and it is the largest receiving port in the United States for Very Large Crude Carriers (tank ships greater than 125,000 deadweight tons). It is the largest North American port for steel, paper, and meat imports as well as the largest importer of cocoa beans and fruit on the east coast.

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USACE CWMS - Delaware River Watershed
Created: July 10, 2018, 8:22 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Delaware River Watershed Conversion Points
Created: July 10, 2018, 8:27 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Delaware River Watershed Centerline
Created: July 10, 2018, 8:27 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Delaware River Watershed Study Area
Created: July 10, 2018, 8:28 p.m.
Authors: Jessie Myers

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resource

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Composite Resource Composite Resource
USACE CWMS - Colorado River Watershed (SWF)
Created: July 13, 2018, 12:54 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Colorado River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Colorado River Watershed (SWF) Bank Lines
Created: July 13, 2018, 1:05 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Colorado River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Colorado River Watershed (SWF) Centerlines
Created: July 13, 2018, 1:12 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Colorado River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)

ABSTRACT:

See USACE CWMS - Colorado River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Colorado River Watershed (SWF) Study Area
Created: July 13, 2018, 1:25 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Colorado River Watershed (SWF) Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Colorado River Watershed (SWF)
Created: July 13, 2018, 1:36 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Colorado River flows northwest to southeast, beginning approximately near Lamesa, TX and emptying into the Gulf of Mexico near Bay City, TX. The river begins at an approximate elevation of 3,300 ft. While the perennial portion of the river is entirely located within Texas, its drainage basin of approximately 42,000 square miles does encompass part of eastern New Mexico. Precipitation within the Colorado River basin varies from west to east. The western portion of the basin receives 14-16 inches of precipitation, on average, each year. As one travels east, average annual precipitation exceeds 40 inches. The basin, particularly in the southeast, can experience extremely intense precipitation events capable of producing staggering rainfall totals. These systems range from intense thunderstorms to hurricanes.
Many reservoirs were constructed in the Colorado River Basin, and they are managed for water supply, irrigation, flood control, recreation, and other uses. Several entities assist with water management operations including: U.S. Army Corps of Engineers (USACE), U.S. Bureau of Reclamation (USBR), Upper Colorado River Authority (UCRA), Lower Colorado River Authority (LCRA), and Colorado River Municipal Water District (CRMWD). Reservoirs in the basin with USACE regulatory authority include: Hords Creek Dam within the Pecan Bayou basin, O.C. Fisher Dam and Twin Buttes Dam (Section 7) within the Concho River basin, and Mansfield Dam (Section 7) on the mainstem Colorado River.

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USACE CWMS - Trinity River Watershed (SWF)
Created: July 13, 2018, 2:47 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Trinity River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Trinity River Watershed (SWF) Bank Lines
Created: July 13, 2018, 2:53 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Trinity River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Trinity River Watershed (SWF) Centerlines
Created: July 13, 2018, 2:58 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Trinity River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)

ABSTRACT:

See USACE CWMS - Trinity River Watershed (SWF) Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Trinity River Watershed (SWF) Study Area
Created: July 13, 2018, 3:12 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Trinity River Watershed (SWF) Collection Resouorce

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Collection Resource Collection Resource
USACE CWMS - Trinity River Watershed (SWF)
Created: July 13, 2018, 3:16 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The West Fork Trinity River begins in Archer County and flow in a southeasterly direction for approximately 715 miles to empty into Trinity Bay which empties into Galveston Bay and then into the Gulf of Mexico. The Trinity River and its principal tributaries West Fork, Clear Fork, Denton Creek, Elm Fork, and East Fork flow through the urban populations of the Fort Worth/Dallas Metropolitan area. The Trinity River then flows from Dallas to the Texas coast through primarily agricultural land. The total drainage area of the Trinity River basin is approximately 17,969 square miles. The precipitation varies from northwest to southeast portion of the basin. The northern portion of the basin receives 35-40 inches of precipitation, on average, each year. As one travel southeast, the average annual precipitation exceeds 50 inches. The basin, particularly in the southeast, can experience extremely intense precipitation events capable of producing staggering rainfall totals. These systems range from intense thunderstorms to hurricanes. The range in average annual precipitation is shown on the figure below.
Many reservoirs were constructed in the Trinity Basin, and they are managed for flood control, water supply, recreation, and other uses. Several entities assist with water management operations including: U.S. Army Corp of Engineers (USACE), Tarrant Regional Water District (TRWD), Dallas Water Utilities, Trinity River Authority (TRA), and North Texas Municipal Water District (NTMWD). Reservoirs in the basin with USACE regulatory authority include; Benbrook Dam, Joe Pool Dam, Ray Roberts Dam, Lewisville Dam, Grapevine Dam, Lavon Dam, Navarro Mills Dam, and Bardwell Dam.
The Upper Trinity encompasses the Fort Worth/Dallas Metropolitan area and five of the USACE reservoirs provide flood reduction management for the urban area. During non-flood control operation, the USACE reservoirs are operated for water supply requests from local water authorities: TRWD, Dallas Water Utilities, and, NTWMD. During flood control operations, the USACE reservoirs are operated to multiple downstream USGS gages within the urban area to provide a balanced system approach of the USACE flood storage and the local water supply reservoir releases. Priority is first given to the local water supply reservoir releases at the downstream USGS gage locations. The USGS gages within the Fort Worth/Dallas Metropolitan area that are key downstream constraints for system balancing are: West Fork Trinity River at Fort Worth, West Fork Trinity River at Grand Prairie, Elm Fork Trinity River near Carrollton, and Trinity River at Dallas.

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USACE CWMS - Okeechobee Watershed
Created: July 13, 2018, 3:42 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Okeechobee Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Okeechobee Watershed Bank Lines
Created: July 13, 2018, 3:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Okeechobee Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Okeechobee River Watershed Centerlines
Created: July 13, 2018, 5:02 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Okeechobee River Watershed Collection Resource

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ABSTRACT:

See USACE CWMS - Okeechobee River Watershed Collection Resource

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Geographic Feature (ESRI Shapefiles) Geographic Feature (ESRI Shapefiles)
USACE CWMS - Okeechobee River Watershed Study Area
Created: July 13, 2018, 5:18 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Okeechobee River Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Okeechobee River Watershed
Created: July 13, 2018, 5:22 p.m.
Authors: Mayss Saadoon

ABSTRACT:

The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:
- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

Lake Okeechobee has a watershed area of about 5,500 square miles. The watershed covers most of the central part of Florida, south from Orlando to the Everglades Agricultural Area and generally east of the central peninsular ridge that acts as the drainage divide for runoff flowing either into the Atlantic Ocean or the Gulf of Mexico. The individual drainage basins in the area constitute a single watershed, as in most cases their waters intermingle during periods of heavy rainfall. The watershed is comprised of the following 8 basins: Upper Kissimmee Basin, Lower Kissimmee Basin, Istokpoga Basin, Fisheating Creek, Taylor Creek-Nubbin Slough, St. Lucie, Caloosahatchee, and Lake Okeechobee.

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USACE CWMS - Meramec Watershed
Created: Aug. 22, 2018, 5:16 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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USACE CWMS - Illinois Watershed
Created: Aug. 22, 2018, 5:34 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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USACE CWMS - Cuivre Watershed
Created: Aug. 22, 2018, 5:43 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Cache Watershed
Created: Aug. 22, 2018, 5:52 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Mississippi River Watershed MVS Collection Resource

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USACE CWMS - Lehigh Watershed
Created: Aug. 22, 2018, 7:03 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resource

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Collection Resource Collection Resource
USACE CWMS - Schuykill Watershed
Created: Aug. 22, 2018, 7:19 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resource

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USACE CWMS - Lackawayen Watershed
Created: Aug. 22, 2018, 7:42 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Delaware River Watershed Collection Resources

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USACE CWMS - Smith Watershed
Created: Aug. 24, 2018, 3:47 p.m.
Authors: Mayss Saadoon

ABSTRACT:

See USACE CWMS - Roanoke Watershed Collection Resource

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