Denman Park Dam Reservoir Report

Last Updated: December 5, 2025

Denman Park Dam in San Antonio, Texas, is a vital local government-owned structure regulated by the Texas Commission on Environmental Quality (TCEQ).


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Summary

Designed by Freese and Nichols, this Earth-type dam with a buttress core stands at a height of 20 feet and stretches 490 feet in length. Its primary purpose is categorized as 'Other', serving as a critical component along the TR-San Antonio river.

With a storage capacity of 19 acre-feet and a maximum discharge of 90 cubic feet per second, Denman Park Dam plays a crucial role in managing water resources in the area. The dam's spillway, an uncontrolled type, has a width of 19 feet to handle excess water flow during heavy rainfall events. Despite its moderate hazard potential, the dam's condition is assessed as satisfactory, with regular inspections conducted every five years to ensure its structural integrity and functionality.

The risk management measures for Denman Park Dam are currently not specified, but its risk assessment indicates a moderate level of risk. With a history of modifications in 2016 focusing on hydraulic improvements, the dam continues to be a significant asset for water management in the region, highlighting the importance of sustainable infrastructure for climate enthusiasts and water resource experts alike.

Years Modified

2016 - Hydraulic

Dam Length

490

Dam Height

20

River Or Stream

TR-SAN ANTONIO

Primary Dam Type

Earth

Surface Area

1.5

Hydraulic Height

20

Drainage Area

0.01

Nid Storage

19

Structural Height

20

Outlet Gates

Uncontrolled - 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.