Lake Irine Dam Reservoir Report
Last Updated: December 5, 2025
Lake Irine Dam, located in Grimes County, Texas, is a private earth dam built in 1946 primarily for recreational purposes.
°F
°F
mph
Wind
%
Humidity
Summary
Standing at a height of 15 feet and stretching over 1008 feet in length, the dam holds a maximum storage capacity of 336 acre-feet, with a normal storage level of 200 acre-feet. The dam is situated on the Pine Branch river and features an uncontrolled spillway with a width of 90 feet.
Despite being a private facility, the dam is subject to state permitting and inspection requirements. While it is not regulated by the state, it is designed to withstand moderate risk, with a hazard potential that is not currently rated. The dam is equipped with two uncontrolled outlet gates and has not undergone any significant modifications in recent years. Although the condition assessment is not rated, the dam remains operational for recreational activities and continues to serve as a vital water resource for the surrounding area.
Year Completed |
1946 |
Dam Length |
1008 |
Dam Height |
15 |
River Or Stream |
PINE BRANCH |
Primary Dam Type |
Earth |
Surface Area |
43 |
Hydraulic Height |
15 |
Nid Storage |
336 |
Structural Height |
15 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Lake Irine Dam