Oknoname 111086 Reservoir Report
Nearby: Oknoname 111085 Boatman An
Last Updated: December 5, 2025
Oknoname 111086 is a privately owned dam located in Okmulgee, Oklahoma, specifically in the city of Preston.
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Summary
Completed in 1960, this earth dam stands at a height of 30 feet and stretches over 3280 feet in length along the TR-Flat Rock Creek. The primary purpose of this dam is classified as "Other", with a low hazard potential and very high risk assessment rating.
Managed by the Oklahoma Water Resources Board (OWRB), Oknoname 111086 has state jurisdiction and is subject to regulation, inspection, and enforcement. The dam has a storage capacity of 50 acre-feet, with a normal storage capacity of 25 acre-feet, serving as a controlled spillway with a width of 1 foot. Despite being categorized as "Not Rated" in terms of condition assessment, the dam has an inspection frequency of 5 years, with the last inspection conducted in August 2011.
Water resource and climate enthusiasts will find Oknoname 111086 to be a fascinating structure that plays a crucial role in managing water flow and storage in the area. With its unique design and location, this dam serves as an important piece of infrastructure within the Tulsa District, contributing to the overall water management efforts in Oklahoma.
Year Completed |
1960 |
Dam Length |
3280 |
Dam Height |
30 |
River Or Stream |
TR-FLAT ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
30 |
Nid Storage |
50 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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.
Oknoname 111086