Logan Jct. Detention Dam Reservoir Report
Last Updated: December 15, 2025
Logan Jct.
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Summary
Detention Dam, located in Fremont, Wyoming, is a Federal-owned structure managed by the Bureau of Land Management. Completed in 1952, this gravity dam serves multiple purposes including fire protection, stock watering, and small fish pond support along the Logan Draw river. With a structural height of 23 feet and a hydraulic height of 22 feet, the dam has a normal storage capacity of 204.7 acre-feet and a maximum storage of 246.34 acre-feet, making it a critical resource for water management in the area.
Despite its low hazard potential, the dam's condition assessment is currently rated as unsatisfactory, indicating a need for maintenance and potential improvements in the near future. The last inspection took place in November 2018, with a scheduled inspection frequency of 5 years. With a moderate risk assessment rating of 3, there is a need for risk management measures to be implemented to ensure the safety and functionality of the dam. As climate change impacts water resources and infrastructure, the management and maintenance of structures like Logan Jct. Detention Dam become increasingly important for sustainable water management in the region.
As a key component in the water infrastructure of Fremont County, Wyoming, Logan Jct. Detention Dam plays a crucial role in mitigating flood risks and providing essential water resources for various purposes. With its historical significance dating back to the early 1950s, the dam represents a blend of traditional gravity dam design with modern water management practices. Moving forward, it will be essential for the Bureau of Land Management to prioritize the maintenance and upkeep of this structure to ensure its continued effectiveness in the face of changing climate patterns and increasing water resource demands.
Year Completed |
1952 |
Dam Length |
212 |
River Or Stream |
LOGAN DRAW |
Primary Dam Type |
Gravity |
Surface Area |
18.3 |
Hydraulic Height |
22 |
Drainage Area |
7.4 |
Nid Storage |
246.34 |
Structural Height |
23 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wind River Ab Boysen Reservoir
|
555cfs |
Little Wind River Near Riverton
|
142cfs |
Wind River At Riverton
|
418cfs |
Fivemile Creek Near Shoshoni
|
38cfs |
Sweetwater River Near Sweetwater Station
|
21cfs |
Wind R Bl Boysen Res Wyo
|
819cfs |
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.
Logan Jct. Detention Dam