Dam #1 Reservoir Report
Nearby: Bradley J.D. Oknoname 141004
Last Updated: December 5, 2025
Dam #1, located in Snyder, Oklahoma, on Coffin Creek, is a privately owned gravity dam designed by USDA NRCS and completed in 1999.
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Summary
With a height of 12.7 meters and a structural height of 18.7 meters, the dam has a storage capacity of 71.3 million cubic meters and serves multiple purposes, including flood control and irrigation. The dam is regulated by the OWRB and undergoes regular inspections to ensure its safety and functionality.
Despite its low hazard potential, Dam #1 poses a very high risk due to its critical location and the potential impact of a failure on downstream areas. The spillway, controlled and 1 meter wide, is designed to handle a maximum discharge of 10.4 cubic meters per second. The dam has a surface area of 7 hectares and drains a watershed area of 156 square kilometers. With a controlled spillway and valve for outlet gates, Dam #1 is equipped to manage water levels and prevent overflow during periods of heavy rainfall.
With its strategic location and essential role in managing water resources in Tillman County, Dam #1 stands as a vital infrastructure for the local community. Despite the need for ongoing risk assessment and management measures, the dam continues to serve its purpose effectively, highlighting the importance of proper maintenance and regulation for ensuring the resilience of water infrastructure in the face of changing climate conditions.
Year Completed |
1999 |
Dam Length |
588 |
Dam Height |
12.7 |
River Or Stream |
COFFIN CREEK |
Primary Dam Type |
Gravity |
Surface Area |
7 |
Hydraulic Height |
10.2 |
Drainage Area |
156 |
Nid Storage |
71.3 |
Structural Height |
18.7 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Nid Height |
19 |
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.
Dam #1