Units 1 And 2 Ash And Clear Water Reservoir Report
Nearby: Fgd Effluent #4 Fgd Effluent Pond #5
Last Updated: December 15, 2025
Units 1 and 2 Ash and Clear Water, also known as Refiling 9418r Ash Pond No.1, is a public utility structure located in Lincoln, Wyoming, along HWY.
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Summary
189. This earth dam, designed by Gary Van Riessen and completed in 1994, serves the primary purpose of debris control on the Hams Fork-Offstream river. With a height of 71 feet and a length of 6100 feet, it has a normal storage capacity of 4057 acre-feet and covers a surface area of 206 acres. Despite being classified as low hazard potential, the dam is in fair condition as of the last inspection in August 2021.
The structure is situated in Congressional District 00 of Wyoming, represented by Liz Cheney (R), and falls under the regulatory oversight of the State Engineer's Office (SEO). It is subject to state permitting, inspection, and enforcement, ensuring compliance with safety standards and regulations. With a risk assessment rating of High (2), the dam poses some level of risk that is likely being managed through appropriate risk management measures. The absence of a spillway and the presence of two other controlled outlet gates indicate a unique design for managing water flow.
Overall, Units 1 and 2 Ash and Clear Water is an essential component of water resource management in Wyoming, safeguarding against debris and contributing to the overall protection of the surrounding environment. Climate and water resource enthusiasts will find this structure intriguing due to its design features, purpose, and regulatory framework, emphasizing the importance of responsible infrastructure development in maintaining a sustainable water supply and mitigating potential hazards.
Year Completed |
1994 |
Dam Length |
6100 |
Dam Height |
71 |
River Or Stream |
HAMS FORK-OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
206 |
Hydraulic Height |
71 |
Nid Storage |
4057 |
Structural Height |
88 |
Outlet Gates |
Other Controlled - 2 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
88 |
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.
Units 1 And 2 Ash And Clear Water