John Graves Dam No 5 Reservoir Report
Last Updated: December 5, 2025
John Graves Dam No 5, located in Mills County, Texas, was completed in 1964 and serves primarily for irrigation purposes along the Hog Branch river.
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Summary
This earth dam stands at a height of 13 feet and has a storage capacity of 75 acre-feet. While it also supports fire protection, stock, small fish pond, and recreational activities, the dam does not have a spillway and is not regulated by the state.
With a high hazard potential rating, limited information is available on the condition assessment of John Graves Dam No 5. The dam, owned privately, has not been inspected since April 1974, and its emergency action plan status and risk management measures are unknown. Despite these uncertainties, the dam continues to play a crucial role in water resource management and agricultural irrigation in the region.
For water resource and climate enthusiasts, the historical significance and potential risks associated with John Graves Dam No 5 make it an intriguing subject of study. As a key infrastructure supporting irrigation activities in the area, understanding the dam's condition and emergency preparedness is essential for ensuring the safety of surrounding communities and the sustainable use of water resources in the region.
Year Completed |
1964 |
Dam Length |
320 |
Dam Height |
13 |
River Or Stream |
HOG BRANCH |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
75 |
Structural Height |
13 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
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 5