Harvill Gss Reservoir Report
Last Updated: December 5, 2025
Harvill Gss, located in Montague, Texas, is a privately owned earth dam built in 1972 by the USDA NRCS.
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Summary
This structure, standing at a height of 36 feet and a length of 380 feet, serves a primary purpose classified as 'Other'. The dam holds a storage capacity of 50 acre-feet, with a normal storage level of 41 acre-feet, and is associated with Mallard Creek.
Despite being non-regulated by the state, Harvill Gss poses a high risk level, indicating the need for proactive risk management measures. The dam has not been rated for its condition assessment, and there is limited information available regarding its emergency action plan and hazard potential. With no spillway and limited outlet gates, the structure may require further evaluation and maintenance to ensure its safety and integrity over time.
Water resource and climate enthusiasts will find Harvill Gss an intriguing case study due to its unique design features and high-risk classification. The involvement of federal agencies like the Natural Resources Conservation Service in its construction adds another layer of interest to its history. As the dam continues to age, monitoring its condition and implementing necessary safety measures will be crucial to prevent any potential hazards associated with its operation.
Year Completed |
1972 |
Dam Length |
380 |
Dam Height |
36 |
River Or Stream |
MALLARD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
36 |
Nid Storage |
50 |
Structural Height |
36 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Elm Fk Trinity Rv At Fm 1198 Nr Myra
|
1cfs |
Belknap Ck Nr Ringgold
|
112cfs |
Beaver Ck Nr Ringgold
|
145cfs |
Red Rv Nr Terral
|
200cfs |
Mud Creek Near Courtney
|
0cfs |
Denton Ck At Cr 2513 Nr Decatur
|
13cfs |
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.
Harvill Gss