Grogan Dam Reservoir Report
Nearby: Nickels Lake Dam Hall Lake No 1 Dam
Last Updated: December 5, 2025
Grogan Dam, located in Cass County, Texas, is a private-owned structure built in 1929 on the TR-Frazier Creek.
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Summary
This Earth-type dam stands at 25 feet high and stretches 700 feet in length, with a storage capacity of 192 acre-feet. Despite its age, the dam has not been rated for its condition, and its hazard potential is labeled as "Not Available."
With no spillway and only one outlet gate, Grogan Dam poses a high risk according to the data, although specific risk management measures are not outlined. The dam's purpose is listed as "Other," suggesting its role in water resource management or climate control is not clearly defined. The surrounding area's drainage and surface area information are not provided, leaving uncertainty about the dam's impact on local water resources.
For water resource and climate enthusiasts, Grogan Dam presents an intriguing case study of an older, privately-owned dam with limited information on its current condition and risk management practices. The lack of regulatory oversight and maintenance details raises questions about the dam's long-term sustainability and potential impact on the environment. Further research and monitoring may be necessary to understand the full scope of Grogan Dam's role in managing water resources in the region.
Year Completed |
1929 |
Dam Length |
700 |
Dam Height |
25 |
River Or Stream |
TR-FRAZIER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
192 |
Structural Height |
25 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Black Cypress Bayou At Jefferson
|
241cfs |
Big Cypress Ck Abv Sh 43 Nr Karnack
|
538cfs |
Little Cypress Ck Nr Jefferson
|
358cfs |
Red River At Spring Bank
|
7140cfs |
Sulphur Rv Nr Texarkana
|
576cfs |
Big Cypress Ck Nr Jefferson
|
97cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Grogan Dam