Gs Dd No C 22-8 Reservoir Report
Nearby: Gs Dd No 17-20a Dd No 17-16
Last Updated: December 12, 2025
Located in Netawaka, Kansas, Gs Dd No C 22-8 is a flood risk reduction dam built in 1996 with a primary purpose of debris control and flood risk reduction along Gregg Creek.
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Summary
Designed by P.E. Wilbur Naylor, this earth dam stands at a height of 27.6 feet and has a length of 700 feet, providing a storage capacity of 76.4 acre-feet. With a low hazard potential and a moderate risk assessment rating, this structure has not been inspected since 1996 and is currently in a not-rated condition.
While the dam does not fall under state jurisdiction or regulation, it serves an essential role in protecting the surrounding area from potential flooding events. With a spillway width of 50 feet and a maximum discharge of 581 cubic feet per second, Gs Dd No C 22-8 plays a critical role in managing water flow and reducing the risk of flooding in Brown County, Kansas. Despite not having a state-inspection, the dam continues to operate effectively in its flood risk reduction capacity.
As water resource and climate enthusiasts monitor the condition and functionality of dams like Gs Dd No C 22-8, it is crucial to ensure regular inspections and maintenance to uphold their structural integrity and effectiveness in flood protection. With its strategic location along Gregg Creek, this earth dam stands as a testament to the importance of flood risk reduction infrastructure in safeguarding communities and ecosystems from the impacts of extreme weather events and climate change.
Year Completed |
1996 |
Dam Length |
700 |
Dam Height |
27.6 |
River Or Stream |
GREGG CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
3.9 |
Drainage Area |
0.2 |
Nid Storage |
76.4 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Delaware R Nr Muscotah
|
37cfs |
Big Nemaha River At Falls City
|
310cfs |
Turkey C Nr Seneca
|
15cfs |
Missouri River At Rulo
|
28600cfs |
North Fork Big Nemaha River At Humboldt
|
67cfs |
Vermillion C Nr Wamego
|
8cfs |
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 C 22-8