Lake Run-A-Muck Dam Reservoir Report

Last Updated: December 6, 2025

Lake Run-A-Muck Dam, located in San Jacinto, Texas, was completed in 1960 and serves as a recreational spot for water enthusiasts.


°F

°F

mph

Wind

%

Humidity

Summary

This private dam, with a height of 10 feet and a length of 700 feet, holds a storage capacity of 50 acre-feet, making it a popular destination for various water activities. The dam, primarily made of earth with a buttress core, overlooks the TR-Coley Creek and offers a surface area of 14 acres for visitors to enjoy.

Although not regulated by the state, Lake Run-A-Muck Dam has undergone inspections and maintains a moderate risk assessment rating. The dam features an uncontrolled spillway with a width of 3 feet and three uncontrolled outlet gates. Despite its hazard potential status being labeled as "Not Available," the dam's condition remains unrated as of the last inspection in 2009. With its scenic location and recreational purpose, Lake Run-A-Muck Dam continues to attract water resource and climate enthusiasts seeking a relaxing escape in the heart of Texas.

Year Completed

1960

Dam Length

700

Dam Height

10

River Or Stream

TR-COLEY CREEK

Primary Dam Type

Earth

Surface Area

14

Hydraulic Height

10

Nid Storage

50

Structural Height

10

Outlet Gates

Uncontrolled - 3

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

10
       
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.