28-10b Reservoir Report
Last Updated: December 13, 2025
Located in Woodlawn, Kansas, the 28-10b dam serves a crucial role in debris control and flood risk reduction along Gregg Creek-TR.
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Summary
Built in 2005, this earth dam stands at a height of 28 feet and stretches 600 feet in length, with a storage capacity of 279.8 acre-feet. The dam's spillway, with a controlled design and a width of 100 feet, can handle a maximum discharge of 1974 cubic feet per second, ensuring effective water management during heavy rainfall events.
Managed by the Kansas Department of Agriculture, the 28-10b dam is regulated, inspected, and enforced by the state to ensure its structural integrity and functionality. Despite being classified as low hazard potential and not yet rated for condition assessment, this dam is equipped with safety measures and emergency protocols. However, its risk assessment is labeled as very high, highlighting the importance of ongoing monitoring and maintenance to mitigate potential hazards and protect downstream communities in Nemaha County.
As water resource and climate enthusiasts, the intricate details of the 28-10b dam's design, purpose, and functionality provide valuable insights into the intersection of infrastructure, environmental stewardship, and public safety. With its contribution to debris control, flood risk reduction, and water storage, this dam stands as a key component in the local water management system, demonstrating the critical role that such structures play in safeguarding communities and ecosystems against the impacts of extreme weather events and changing climate conditions.
Year Completed |
2005 |
Dam Length |
600 |
Dam Height |
28 |
River Or Stream |
GREGG CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
10 |
Drainage Area |
0.95 |
Nid Storage |
279.8 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Turkey C Nr Seneca
|
14cfs |
Big Nemaha River At Falls City
|
310cfs |
Delaware R Nr Muscotah
|
34cfs |
North Fork Big Nemaha River At Humboldt
|
67cfs |
Missouri River At Rulo
|
26600cfs |
Black Vermillion R Nr Frankfort
|
43cfs |
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.
28-10b