Macomber Reservoir Reservoir Report

Last Updated: December 6, 2025

Macomber Reservoir, located in La Salle, Texas, was completed in 1912 and serves as a vital source of irrigation for the surrounding area.


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Summary

The reservoir, with a dam height of 20 feet and a storage capacity of 280 acre-feet, is primarily used for agricultural purposes. It is situated along the Nueces River and is operated by a private owner.

Despite being a privately owned structure, Macomber Reservoir is subject to state permitting and inspection requirements. The dam, built with earth and buttress core types, stands at a structural height of 20 feet and a length of 100 feet. While the reservoir currently has a high hazard potential, its condition assessment is not rated, indicating the need for further evaluation and potential risk management measures.

The risk assessment for Macomber Reservoir is classified as high, with a risk char summary of 2. Although the reservoir does not have a spillway, it is equipped with one outlet gate for water management. The presence of this important water resource along the Nueces River underscores the importance of proper maintenance and monitoring to ensure its continued functionality and safety for both irrigation purposes and environmental conservation efforts in the region.

Year Completed

1912

Dam Length

100

Dam Height

20

River Or Stream

NUECES RIVER

Primary Dam Type

Earth

Hydraulic Height

20

Nid Storage

280

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.