O&M Addition Reservoir Report
Nearby: Oknoname 143004 Keystone Dam
Last Updated: February 24, 2026
O&M Addition, located in Tulsa, Oklahoma, along the Mud Creek, is a privately owned recreational dam that was completed in 1960.
Summary
Standing at 30 feet in height and spanning 450 feet in length, this earth dam serves primarily for recreational purposes. With a normal storage capacity of 50 acre-feet and a maximum storage of 90 acre-feet, O&M Addition provides a serene oasis for water resource and climate enthusiasts to enjoy various water activities.
Managed by the Oklahoma Water Resources Board, O&M Addition has a low hazard potential and a very high risk assessment rating. Despite not being condition rated, the dam is inspected every five years to ensure its structural integrity and safety. Equipped with a controlled spillway and a single valve outlet gate, this dam has been designed to withstand high discharges of up to 1600 cubic feet per second. Furthermore, with its stone core and soil foundation, O&M Addition continues to be a vital part of the water infrastructure in Tulsa, Oklahoma.
As a popular spot for outdoor recreation, O&M Addition not only offers a peaceful retreat for visitors but also serves as a critical water resource in the region. With its rich history dating back to the 1960s, this earth dam plays a significant role in water management and conservation efforts in the area. Whether for boating, fishing, or simply enjoying the scenic views, O&M Addition remains a beloved destination for water enthusiasts seeking to connect with nature and appreciate the beauty of the surrounding landscape.
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15-Day Weather Outlook
Year Completed |
1960 |
Dam Length |
450 |
Dam Height |
30 |
River Or Stream |
MUD CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
30 |
Nid Storage |
90 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
5-Day Hourly Forecast Detail
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.
O&M Addition
Old State Highway 51 Sand Springs