Hinnant & Fulbright Dam No 1 Reservoir Report

Last Updated: December 24, 2025

Hinnant & Fulbright Dam No 1, located in Zapata, Texas, is a private earth dam completed in 1969 on the TR-TAGUACHE CREEK.


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Summary

With a height of 20 feet and a length of 1420 feet, this dam serves a primary purpose of 'Other' and has a normal storage capacity of 240 acre-feet. Despite being privately owned, the dam is regulated by the state of Texas, with permitting and inspection requirements in place.

The dam has undergone modifications in 1975, although specific details are not available. It lacks a spillway and has no outlet gates, indicating a potentially elevated hazard potential. The risk assessment for Hinnant & Fulbright Dam No 1 rates it as 'High (2)', highlighting the importance of ongoing risk management measures to ensure the safety and integrity of the structure.

Water resource and climate enthusiasts interested in the management and condition of dams will find Hinnant & Fulbright Dam No 1 to be a noteworthy case study. The dam's location, design characteristics, and regulatory oversight offer valuable insights into the challenges and considerations involved in maintaining critical water infrastructure in Texas.

Years Modified

1975 - Other

Year Completed

1969

Dam Length

1420

Dam Height

20

River Or Stream

TR-TAGUACHE CREEK

Primary Dam Type

Earth

Surface Area

50.5

Hydraulic Height

20

Drainage Area

0.9

Nid Storage

240

Structural Height

20

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

20
       
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.