Allen No.2 Reservoir Report
Nearby: Oknoname 049004 Allen No.1
Last Updated: December 16, 2025
Located in Garvin County, Oklahoma, Allen No.2 is a privately-owned earth dam designed by the USDA NRCS and completed in 1977.
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Summary
With a height of 28 feet and a length of 570 feet, this dam serves as a crucial water resource structure on TR-Washington Creek. Managed by the Oklahoma Water Resources Board, Allen No.2 has a normal storage capacity of 40 acre-feet and a maximum storage capacity of 160 acre-feet, with a controlled spillway type and one valve outlet gate.
Despite being classified as low hazard potential, Allen No.2 is considered to have a very high risk assessment, emphasizing the importance of regular inspections and maintenance. The dam has not been rated for its condition assessment, but it meets state regulatory standards for permitting, inspection, and enforcement. As a key structure in the area, Allen No.2 plays a critical role in water management and flood control, demonstrating the importance of sustainable infrastructure for water resource and climate enthusiasts in the region.
Overall, Allen No.2 stands as a testament to the collaboration between private owners, government agencies, and design experts in ensuring the safety and efficiency of water resource structures. With its strategic location in Pauls Valley and the oversight of the Oklahoma Water Resources Board, this dam serves as a vital component of the local water infrastructure, highlighting the ongoing efforts to manage water resources effectively in the face of changing climate conditions.
Year Completed |
1977 |
Dam Length |
570 |
Dam Height |
28 |
River Or Stream |
TR-WASHINGTON CR |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
160 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Allen No.2