Upper Cibolo Creek Ws Scs Site 2 Dam Reservoir Report

Last Updated: December 5, 2025

Upper Cibolo Creek WS SCS Site 2 Dam in Boerne, Texas, is a local government-owned structure designed by Dannenbaum and regulated by the Texas Commission on Environmental Quality.


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Summary

Completed in 1980, this earth-type dam stands at 54 feet tall with a length of 1,290 feet, serving primarily for flood risk reduction along Ranger Creek. The dam has a storage capacity of 1,060 acre-feet and a normal storage of 139 acre-feet, covering a drainage area of 2.6 square miles.

The dam features an uncontrolled spillway with a width of 202 feet and is equipped with one slide and two uncontrolled gates as outlet structures. The last inspection in 2017 rated its condition as fair, with an inspection frequency of 5 years. While the hazard potential is not available, the risk assessment indicates a moderate level (3). Overall, Upper Cibolo Creek WS SCS Site 2 Dam plays a crucial role in managing flood risks in the area, highlighting the importance of maintaining and monitoring its structural integrity for water resource and climate enthusiasts.

Year Completed

1980

Dam Length

1290

Dam Height

54

River Or Stream

RANGER CREEK

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

54

Drainage Area

2.6

Nid Storage

1060

Structural Height

54

Outlet Gates

Slide (sluice gate) - 1, Uncontrolled - 2

Hazard Potential

Not Available

Foundations

Rock, Soil

Nid Height

54
       
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.