Scs-Maysville Laterals Site-H02 Reservoir Report

Last Updated: December 7, 2025

SCS-Maysville Laterals Site-H02, located in Garvin County, Oklahoma, is a state-owned earth dam designed by the USDA NRCS for flood risk reduction along TR-Happy Hollow Creek.


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Summary

Completed in 1972, this dam stands at a height of 19 feet and has a storage capacity of 93 acre-feet. With a surface area of 5 acres and a controlled spillway, the dam has a low hazard potential and a very high risk assessment rating.

Managed by the Oklahoma Water Resources Board (OWRB), this dam has state jurisdiction and is subject to state regulations for permitting, inspection, and enforcement. The primary purpose of SCS-Maysville Laterals Site-H02 is flood risk reduction, with a valve outlet gate for water control. Despite being last inspected in 1980, with an inspection frequency of 5 years, the dam's condition is currently not rated.

The site's risk management measures, emergency action plan (EAP), and inundation maps are not updated, with no assigned DSAC date for risk assessment. With its strategic location and critical role in flood control, SCS-Maysville Laterals Site-H02 serves as a vital water resource infrastructure in the region, protecting communities downstream from potential flooding events.

Year Completed

1972

Dam Length

875

Dam Height

19

River Or Stream

TR-HAPPY HOLLOW CR

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

19

Nid Storage

93

Structural Height

19

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

19
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.