Boyd Earl Reservoir Report
Nearby: Borders Rw Oknoname 063002
Last Updated: December 6, 2025
Boyd Earl is a private earth dam located in Gerty, Oklahoma, along the Big Sandy Creek.
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Summary
Built in 1978 by USDA NRCS, this dam stands at 28 feet high with a hydraulic height of 25 feet and a length of 460 feet. It has a storage capacity of 168 acre-feet and a maximum discharge of 930 cubic feet per second, making it a crucial structure for water resource management in the area.
Managed by the Oklahoma Water Resources Board, Boyd Earl serves multiple purposes, including flood control and irrigation. Despite its low hazard potential, the dam is considered to have a very high risk due to its age and lack of recent condition assessments. With a controlled spillway type and one valve outlet gate, Boyd Earl requires regular inspections every five years to ensure its structural integrity and safety.
For water resource and climate enthusiasts, Boyd Earl presents an intriguing case study in the maintenance and management of aging infrastructure. As a vital component in the local water system, its risk assessment highlights the importance of proactive monitoring and maintenance to prevent potential hazards and ensure the continued reliability of water resources in the region.
Year Completed |
1978 |
Dam Length |
460 |
Dam Height |
28 |
River Or Stream |
BIG SANDY CR |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
168 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little River Near Sasakwa
|
12cfs |
Canadian River At Calvin
|
361cfs |
North Canadian River Near Wetumka
|
209cfs |
Blue River Near Connerville
|
54cfs |
Little River Near Tecumseh
|
8cfs |
Pennington Creek Near Reagan
|
7cfs |
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.
Boyd Earl