Rose Lake Dam Reservoir Report

Last Updated: December 5, 2025

Rose Lake Dam, located in Guadalupe, Texas, is a privately owned structure built in 1921 by Standard Oil of New Jersey for irrigation purposes.


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Summary

The dam, standing at 28 feet high and 1710 feet long, serves as a vital component in managing water resources for the surrounding area. It is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes state inspection and enforcement to ensure its safety and functionality.

With a storage capacity of 1450 acre-feet, Rose Lake Dam plays a crucial role in water management along the TR-San Marcos River. The dam features an uncontrolled spillway and outlet gates to regulate water flow. Despite being last inspected in 1983 and not currently rated for condition assessment, the dam is considered to have moderate risk potential, highlighting the importance of ongoing monitoring and maintenance efforts.

As a key infrastructure for irrigation in the region, Rose Lake Dam stands as a testament to the intersection of water resource management and climate considerations. Its historical significance, coupled with its role in supporting agricultural activities, underscores the importance of sustainable water usage and the need for continued oversight to ensure its long-term functionality and safety.

Year Completed

1921

Dam Length

1710

Dam Height

28

River Or Stream

TR-SAN MARCOS RIVER

Primary Dam Type

Earth

Surface Area

99

Hydraulic Height

28

Nid Storage

1450

Structural Height

28

Outlet Gates

Uncontrolled - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

28
       
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.