Clark No. 1 Reservoir Report
Nearby: Amelia No. 1 Griswold No. 1
Last Updated: December 6, 2025
Clark No.
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Summary
1 is a privately owned earth dam located in Niobrara, Wyoming, specifically in the city of Edgemont S D. This dam serves multiple purposes, including fire protection, stock watering, and small fish pond management. Completed in 1956, the dam stands at a height of 27 feet with a hydraulic height of 22 feet, providing a storage capacity of 77 acre-feet. Despite its low hazard potential, the dam is considered to be in fair condition as of the last inspection in November 2019.
Situated on the Clark Draw river, Clark No. 1 plays a crucial role in managing water resources in the region, especially for fire protection and agricultural activities. The dam has a spillway width of 85 feet and a surface area of 5 acres, contributing to its overall functionality. With its proximity to Congressional District 00 in Wyoming, the dam falls under the regulatory jurisdiction of the State Engineer's Office, which oversees its permitting, inspection, and enforcement processes.
For water resource and climate enthusiasts, Clark No. 1 offers a fascinating case study in dam infrastructure and management. As a key water storage feature in the area, the dam's risk assessment reflects a moderate level of concern, prompting the need for ongoing monitoring and maintenance efforts. With its historical significance and continued relevance for local communities, Clark No. 1 exemplifies the intersection of water resource management, environmental stewardship, and public safety in the face of changing climate conditions.
Year Completed |
1956 |
Dam Length |
445 |
Dam Height |
27 |
River Or Stream |
CLARK DRAW |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
22 |
Nid Storage |
77 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Clark No. 1