Lacy Reservoir Report
Nearby: Scs-Rock Creek Site-09 Little Niagra
Last Updated: December 17, 2025
Lacy is a privately-owned earth dam situated in Sulpher, Oklahoma, along the TR-Rock Creek.
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Summary
Built in 1920 for recreational purposes, this dam stands at a height of 27 feet and a length of 1800 feet, providing a storage capacity of 200 acre-feet. Despite its historical significance, Lacy poses a high hazard potential due to its poor condition assessment, prompting a need for immediate attention and maintenance. The dam is under the regulatory jurisdiction of the Oklahoma Water Resources Board (OWRB), with state permitting, inspection, and enforcement in place to ensure public safety and compliance with regulations.
Located in Murray County, Lacy's spillway is of the controlled type, with a width of 1 foot, and features a single valve outlet for water release. The dam's drainage area covers 0.29 square miles, with a maximum discharge capacity of 200 cubic feet per second. Given its very high risk rating and the absence of an Emergency Action Plan (EAP) meeting guidelines, stakeholders and authorities should prioritize the implementation of risk management measures to mitigate potential hazards. Additionally, regular inspections and maintenance are essential to improve the dam's condition and ensure the safety of surrounding communities and ecosystems that rely on its water resources.
Year Completed |
1920 |
Dam Length |
1800 |
Dam Height |
27 |
River Or Stream |
TR-ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
27 |
Drainage Area |
0.29 |
Nid Storage |
200 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Rock Creek At Sulphur
|
8cfs |
Pennington Creek Near Reagan
|
47cfs |
Washita River Near Dickson
|
314cfs |
Washita River Near Pauls Valley
|
327cfs |
Blue River Near Connerville
|
47cfs |
Walnut Creek At Purcell
|
29cfs |
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.
Central - Chickasaw National Rec Area
Central Campground
Rock Creek - Chickasaw National Rec Area
Cold Springs - Chickasaw National Rec Area
The Point - Chickasaw National Rec Area
The Point Campground
Lacy