Gs Dd No 25-21 Reservoir Report
Last Updated: December 13, 2025
Gs Dd No 25-21 is a local government-owned dam located in Netawaka, Kansas, along the Plum Creek-Tr river.
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Summary
Built in 1994, this earth dam stands at a height of 24.9 feet and has a length of 650 feet. With a primary purpose of flood risk reduction, it also serves the purposes of debris control and has a normal storage capacity of 47.1 acre-feet.
The dam has a low hazard potential and a moderate risk assessment rating of 3 out of 5. While it has not been rated for its condition, it is regularly inspected with the last inspection conducted in January 1995. The dam does not have an emergency action plan in place, but it meets regulatory guidelines and has not experienced any significant modifications since its completion.
Located in Brown County, Kansas, Gs Dd No 25-21 provides important flood protection for the surrounding area. With its controlled spillway and uncontrolled design, the dam plays a crucial role in managing water levels and reducing the risk of flooding in the region. Overall, this dam serves as a key infrastructure for water resource management in the local community.
Year Completed |
1994 |
Dam Length |
650 |
Dam Height |
24.9 |
River Or Stream |
PLUM CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
9.8 |
Drainage Area |
0.33 |
Nid Storage |
154.1 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Nemaha River At Falls City
|
310cfs |
Delaware R Nr Muscotah
|
34cfs |
Turkey C Nr Seneca
|
14cfs |
Missouri River At Rulo
|
26600cfs |
North Fork Big Nemaha River At Humboldt
|
67cfs |
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.
Gs Dd No 25-21