B-4 Reservoir Report
Nearby: Bourbon Co State Lake Dam I-1b
Last Updated: December 5, 2025
B-4, located in Uniontown, Kansas, is a local government-owned dam designed by AG Engineering with a primary purpose of flood risk reduction along the Wolfpen Creek-TR.
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Summary
Completed in 2014, this earth dam stands at 31 feet high and spans 750 feet in length, with a storage capacity of 306.1 acre-feet and a surface area of 7.06 acres. Despite its low hazard potential and moderate risk assessment, the dam has not been rated for its condition, and its last inspection took place in April 2015.
Managed by the Kansas Department of Agriculture, B-4 operates under state regulations for permitting, inspection, and enforcement. The dam features an uncontrolled spillway with a width of 50 feet and does not have any outlet gates. While the dam serves additional purposes such as debris control and creating a fish and wildlife pond, its primary focus remains on flood risk reduction for the surrounding area. With its strategic location and design, B-4 plays a crucial role in protecting the community from potential flooding events.
Year Completed |
2014 |
Dam Length |
750 |
Dam Height |
31 |
River Or Stream |
WOLFPEN CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
7.06 |
Drainage Area |
1.42 |
Nid Storage |
306.1 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Marmaton R Nr Uniontown
|
0cfs |
Marmaton R Nr Marmaton
|
194cfs |
Neosho R Nr Iola
|
2530cfs |
Marmaton R Nr Fort Scott
|
4cfs |
L Osage R At Fulton
|
1cfs |
Neosho R Nr Parsons
|
2500cfs |
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.
B-4