Q4 Dam Reservoir Report
Nearby: Sediment Pond R1-A Sediment Pond R1-B
Last Updated: December 5, 2025
Q4 Dam, located in Marshall, Texas, is a privately owned structure with a primary purpose classified as "Other." The dam stands at a height of 33 feet and has a length of 1577 feet, with a storage capacity of 1900 acre-feet.
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Summary
The dam features an uncontrolled spillway with a width of 165 feet and two uncontrolled outlet gates.
Managed by the Mine Safety and Health Administration, Q4 Dam is considered to have a moderate risk level with a hazard potential that is not available. The structure's condition assessment is not rated, and there is no information available on the last inspection date. Despite the lack of certain details, Q4 Dam remains an intriguing feature for water resource and climate enthusiasts in the area, showcasing the importance of understanding and monitoring dam infrastructure for environmental and safety purposes.
Dam Length |
1577 |
Dam Height |
33 |
River Or Stream |
|
Primary Dam Type |
Other |
Hydraulic Height |
33 |
Nid Storage |
1900 |
Structural Height |
33 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sabine Rv Nr Beckville
|
946cfs |
Sabine Rv Bl Longview
|
656cfs |
Sabine Rv Nr Carthage
|
9200cfs |
Little Cypress Ck Nr Jefferson
|
358cfs |
Big Cypress Ck Nr Jefferson
|
97cfs |
Sabine Rv Abv Longview
|
498cfs |
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.
Q4 Dam