West Fork Big Creek Dam P- 11 Reservoir Report
Last Updated: December 12, 2025
West Fork Big Creek Dam P-11, located in Harrison, Missouri, was completed in 2003 by the USDA NRCS and serves as a critical flood risk reduction infrastructure along the TR-Little Polecat river.
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Summary
The dam is an Earth type structure with a height of 25.3 feet and a length of 400 feet, providing a storage capacity of 57 acre-feet. Despite its low hazard potential, the dam plays a significant role in managing water flow and reducing flood risks in the region.
Managed by a local government entity, West Fork Big Creek Dam P-11 is not regulated or inspected by the state, with no active emergency action plan in place. The dam features an uncontrolled spillway and outlet gates, contributing to its moderate risk level of 3. While the structure has not been rated for its condition, its strategic location and purpose make it a vital component of the water resource management system in the area.
Although West Fork Big Creek Dam P-11 may not be a high-profile dam, its importance in flood risk reduction and water management cannot be understated. As climate change continues to impact weather patterns and water resources, structures like this play a crucial role in protecting communities and infrastructure from potential disasters. It serves as a reminder of the ongoing need for sustainable water resource management practices and the essential role of dams in mitigating the effects of extreme weather events.
Year Completed |
2003 |
Dam Length |
400 |
Dam Height |
25.3 |
River Or Stream |
TR-LITTLE POLECAT |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
25 |
Drainage Area |
55 |
Nid Storage |
57 |
Structural Height |
34 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
East Fork Big Creek Near Bethany
|
4cfs |
Thompson River At Trenton
|
140cfs |
Grand River Near Gallatin
|
82cfs |
Thompson River At Davis City
|
22cfs |
Medicine Creek Near Laredo
|
17cfs |
Grand River At Chillicothe
|
361cfs |
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.
West Fork Big Creek Dam P- 11