House Reservoir Report
Nearby: Three Forks Robber's Roost
Last Updated: December 7, 2025
House is a privately owned earth dam located in Edgemont, SD, along the Robbers Roost river in Weston County, Wyoming.
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Summary
Built in 1970, its primary purpose is water supply, with a capacity of 128 acre-feet and a normal storage of 61 acre-feet. The dam stands at 17 feet high with a structural height of 22 feet, and is 665 feet long, covering a surface area of 38 acres and serving a drainage area of 18.9 square miles.
Despite its low hazard potential, House is currently assessed to be in poor condition as of the last inspection in September 2021. The dam's inspection frequency is set at 5 years, and it is regulated, permitted, inspected, and enforced by the Wyoming State Engineer's Office. The dam is not owned or funded by any federal agency and has no associated structures. Its location in a congressional district in Wyoming is represented by Liz Cheney (R), with the US Army Corps of Engineers' Omaha District overseeing it.
Water resource and climate enthusiasts will find House to be a significant structure for water supply in the region, highlighting the importance of maintaining and monitoring its condition to ensure the safety and stability of the dam. Its presence along the Robbers Roost river contributes to the local water management system, serving as a vital resource for the surrounding communities and ecosystems. As climate change continues to impact water resources, the upkeep and assessment of dams like House become even more crucial to safeguard against potential risks and ensure sustainable water management practices.
Year Completed |
1970 |
Dam Length |
665 |
Dam Height |
17 |
River Or Stream |
ROBBERS ROOST |
Primary Dam Type |
Earth |
Surface Area |
38 |
Hydraulic Height |
15 |
Drainage Area |
18.9 |
Nid Storage |
128 |
Structural Height |
22 |
Hazard Potential |
Low |
Nid Height |
22 |
Seasonal Comparison
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Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
House