Dillingham Land Co Reservoir Report
Nearby: Hull James J Oknoname 111025
Last Updated: December 5, 2025
Dillingham Land Co, a private entity located in Okmulgee, Oklahoma, operates a dam on TR-SNAKE CREEK with a primary purpose classified as "Other." The dam, completed in 1940, stands at a height of 26 feet and stretches 580 feet in length, with a storage capacity of 70 acre-feet.
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Summary
Despite being classified as low hazard potential, the risk assessment for this dam is very high, indicating a need for close monitoring and maintenance.
Managed by the Oklahoma Water Resources Board, the Dillingham Land Co dam has a controlled spillway type with a width of 1 foot and an outlet gate consisting of a single valve. The inspection frequency for this structure is every 5 years, with the last inspection conducted in August 2011. While the dam's condition assessment is currently listed as "Not Rated," it is essential for water resource and climate enthusiasts to stay informed about any updates or changes in its risk management measures and emergency action plan.
With a risk management summary of very high (1) and a location in an area prone to flooding, the Dillingham Land Co dam serves as a critical infrastructure for water resource management in the region. As part of the Tulsa District and regulated by the state of Oklahoma, this dam plays a crucial role in flood control and water supply. As climate change continues to impact water resources, understanding and monitoring dams like Dillingham Land Co becomes increasingly important for ensuring the safety and sustainability of our water systems.
Year Completed |
1940 |
Dam Length |
580 |
Dam Height |
26 |
River Or Stream |
TR-SNAKE CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
26 |
Nid Storage |
70 |
Structural Height |
26 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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.
Dillingham Land Co