Stoneglen Dam No 8 Reservoir Report

Last Updated: December 5, 2025

Stoneglen Dam No 8, located in Tarrant County, Texas, was completed in 1986 by HALFF AND ASSOCIATES INC.


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Summary

This concrete buttress dam stands at a height of 25 feet and has a structural height of 25 feet, serving primarily for recreation purposes on the Big Fossil Creek. With a storage capacity of 33 acre-feet and a surface area of 10.3 acres, the dam offers a picturesque backdrop for water resource and climate enthusiasts to explore.

Despite its recreational appeal, Stoneglen Dam No 8 poses a high risk, as indicated by a hazard potential rating of 2. While the dam does not have a spillway, it is equipped with one outlet gate. The dam has not been inspected since July 1986, and its condition is currently not rated. These factors highlight the importance of ongoing monitoring and maintenance to ensure the safety and integrity of the structure for both visitors and the surrounding environment.

As a private-owned dam with no state jurisdiction, Stoneglen Dam No 8 presents an interesting case study for water resource management and climate adaptation strategies. Its location on Big Fossil Creek offers a unique opportunity to study the impact of dams on local ecosystems and water resources in the region. Despite its risk assessment, the dam remains a valuable asset for recreational activities, highlighting the complex balance between human needs and environmental concerns in water infrastructure development.

Year Completed

1986

Dam Length

110

Dam Height

20

River Or Stream

BIG FOSSIL CREEK

Primary Dam Type

Concrete

Surface Area

10.3

Hydraulic Height

20

Drainage Area

20.5

Nid Storage

33

Structural Height

25

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

25
       
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.