Evans Hd Reservoir Report
Last Updated: December 12, 2025
Evans Hd is a private earth dam located in Roger Mills, Oklahoma, with a primary purpose designated as "Other".
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Summary
Completed in 1980, this dam stands at a height of 33 feet and has a storage capacity of 50 acre-feet. The dam is regulated by the Oklahoma Water Resources Board (OWRB) and is subject to state permitting, inspection, and enforcement.
The dam is situated on the TR-SANDSTONE CR river or stream within the Tulsa District of Oklahoma. With a surface area of 3 acres and a drainage area of 412 square miles, Evans Hd plays a crucial role in water resource management in the region. Despite being rated with a low hazard potential, the dam is considered to have a very high risk due to its condition assessment not being rated.
In terms of emergency preparedness, Evans Hd lacks an Emergency Action Plan (EAP) and updated contact information. The dam's risk management measures are not specified, highlighting the need for improved risk assessment and mitigation strategies to address the high-risk classification. For water resource and climate enthusiasts, Evans Hd presents an opportunity to engage in discussions on the importance of dam safety and the challenges associated with managing aging infrastructure in the face of changing environmental conditions.
Year Completed |
1980 |
Dam Height |
33 |
River Or Stream |
TR-SANDSTONE CR |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
33 |
Drainage Area |
412 |
Nid Storage |
50 |
Structural Height |
33 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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.
Evans Hd