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USACE CWMS - Bighorn River Watershed

Authors: Jessie Myers
Owners: Jessie Myers · Jason Sheeley · Adrian Christopher
Resource type:Collection Resource
Created:Jun 28, 2018 at 8:06 p.m.
Last updated: Jun 28, 2018 at 8:15 p.m. by Jessie Myers


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 Bighorn River is a right bank tributary of the Yellowstone River with its headwaters located near Dubois, Wyoming in the Wind River Mountain range. The Bighorn River Watershed originates on the eastern slope of the Continental Divide and starts out as the Wind River. It flows in a generally southeasterly direction towards Riverton, WY, then turns north where it flows into Boysen Reservoir.
Approximately 14 miles downstream from Boysen Dam, at the Wedding of the Rivers, Wind River becomes the Bighorn River and continues to flow north towards its confluence with the Yellowstone River northeast of Billings, MT, passing through Yellowtail Dam in the lower reach.

The drainage basin of the Bighorn River encompasses an area of about 22,900 square miles. Boysen Reservoir on the Wind River has a drainage area of approximately 7,700 square miles. The downstream Bighorn Lake formed by Yellowtail Dam has a drainage area of approximately 19,600 square miles. The topography of the basin varies greatly; ranging from mountainous terrain with peak elevations in the Wind River Range over 13,800 feet to rolling foothills and high plains with elevations near 2,700 feet at the confluence with the Yellowstone River.

Subject Keywords

ResSIM,FIA,Bighorn River Watershed,USACE,IWRSS,USACE Corps Water Management System (CWMS),GeoHMS,RAS

How to cite

Myers, J. (2018). USACE CWMS - Bighorn River Watershed, HydroShare, http://www.hydroshare.org/resource/f38adc96d96c4e839a36619797229798

This resource is shared under the Creative Commons Attribution CC BY.


Sharing status:

  • Discoverable Resource  Discoverable
  • Non Sharable Resource  Not Shareable



 Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
 Coordinate Units:  Decimal degrees
Place/Area Name: Bighorn River Watershed


Collection Contents

Add Title Type Owners Sharing Status My Permission Remove
USACE CWMS - Bighorn River Watershed CompositeResource Jessie Myers · Jason Sheeley · Adrian Christopher Discoverable Open Access


The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone Author Identifiers
Jessie Myers Army Corps of Engineers
Extended Metadata
Name Value
USACE Model Registry Point of contact: USACEModelRegistryAdmin@usace.army.mil


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