River Ranch Tank Dam Reservoir Report

Last Updated: December 5, 2025

River Ranch Tank Dam, located in Mitchell County, Texas, on the TR-COLORADO RIVER, stands as a testament to irrigation infrastructure dating back to 1900.


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Summary

This private Earth dam, with a height of 15 feet and a length of 400 feet, serves primarily for irrigation purposes, storing a maximum of 90 acre-feet of water. The dam's design features a Buttress core type, but lacks a spillway for controlled water release.

Despite its age, River Ranch Tank Dam's condition remains unrated, presenting a high risk level due to its lack of hazard potential assessment. The dam's emergency action plan (EAP) status and risk management measures are unknown, leaving the surrounding area potentially vulnerable in case of a catastrophic failure. As water resource and climate enthusiasts, there is an opportunity to advocate for proper assessment and maintenance of this historic irrigation structure to ensure the safety of both the dam and the community it serves.

Year Completed

1900

Dam Length

400

Dam Height

15

River Or Stream

TR-COLORADO RIVER

Primary Dam Type

Earth

Surface Area

13

Hydraulic Height

15

Nid Storage

90

Structural Height

15

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

15
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.