John Graves Dam No 2 Reservoir Report
Last Updated: December 5, 2025
John Graves Dam No 2, located in Mills County, Texas, was completed in 1974 for the primary purpose of irrigation.
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Summary
This earth-type dam stands at a height of 21 feet and has a storage capacity of 60 acre-feet. While it does not have a spillway, the dam serves multiple purposes including fire protection, stock, small fish ponds, irrigation, and recreation. With a risk assessment rating of "High (2)", the dam's hazard potential is currently not available and its condition has not been rated.
Despite being a privately owned structure, John Graves Dam No 2 is regulated by the state permitting and inspection agencies. It is situated on the TR-Hog Branch river or stream, within the jurisdiction of the Fort Worth District of the US Army Corps of Engineers. The dam does not have any associated locks but features one outlet gate for water release. While the dam's condition has not been assessed, its risk management measures and emergency action plan status are also not available. Water resource and climate enthusiasts may find John Graves Dam No 2 to be an interesting case study in the management and regulation of irrigation and water storage infrastructure in Texas.
Year Completed |
1974 |
Dam Length |
224 |
Dam Height |
21 |
River Or Stream |
TR-HOG BRANCH |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
60 |
Structural Height |
21 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pecan Bayou Nr Mullin
|
2cfs |
San Saba Rv At San Saba
|
140cfs |
Colorado Rv Nr San Saba
|
211cfs |
Leon Rv Nr Hasse
|
2cfs |
Copperas Ck At Fm 2247 Nr Comanche
|
2cfs |
Pecan Bayou Nr Cross Cut
|
436cfs |
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.
John Graves Dam No 2