Marcum No.1 Reservoir Report
Last Updated: December 14, 2025
Marcum No.1 is a privately owned earth dam located in Garvin County, Oklahoma, specifically in the city of Pauls Valley.
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Summary
Built in 1975 by the USDA NRCS, this dam spans 800 feet in length and stands at a height of 23 feet, with a storage capacity of 120 acre-feet. The dam's primary purpose is categorized as "Other," with a low hazard potential and a very high risk assessment score of 1.
The dam is regulated by the Oklahoma Water Resources Board (OWRB) and is subject to state permitting, inspection, and enforcement. It is designed to control the flow of TR-Washington Creek and features a controlled spillway with a width of 1 foot. Despite not being rated for its condition assessment, the dam has a valve outlet gate and is inspected every five years to ensure its structural integrity and safety.
Overall, Marcum No.1 serves as a crucial water resource infrastructure in the region, providing flood control and water storage capabilities. Climate enthusiasts and water resource advocates can appreciate the complexity and importance of this dam in managing water resources and mitigating potential risks in the area.
Year Completed |
1975 |
Dam Length |
800 |
Dam Height |
23 |
River Or Stream |
TR-WASHINGTON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Nid Storage |
120 |
Structural Height |
23 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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.
Marcum No.1