Frd No 21 Reservoir Report
Nearby: Frd No 20 Fox Lake Dam
Last Updated: December 5, 2025
Frd No 21, located in Cassoday, Kansas, is a key flood risk reduction structure designed by the USDA NRCS and completed in 1981.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam stands at 27 feet in height and spans 3000 feet, providing vital protection to the surrounding area from potential flooding events. With a storage capacity of 1260 acre-feet and a surface area of 41.7 acres, Frd No 21 plays a crucial role in managing water resources in the region.
Managed by the local government and regulated by the Kansas Dept. of Agriculture, Frd No 21 is classified as having a high hazard potential due to its function in flood risk reduction. While the condition assessment is currently not rated, regular inspections are conducted every 3 years to ensure the structure's integrity and safety. The dam includes a spillway width of 200 feet, though details on the spillway type are not specified, emphasizing the importance of ongoing monitoring and maintenance to mitigate any potential risks associated with its operation.
Overall, Frd No 21 serves as a vital infrastructure project in Butler County, Kansas, contributing to the protection of nearby communities from the impacts of flooding. As climate change continues to pose challenges to water resource management, structures like Frd No 21 play a crucial role in enhancing resilience and reducing the risks associated with extreme weather events. With its strategic location along the Cole Creek-Tr river/stream, Frd No 21 stands as a testament to effective collaboration between federal and state agencies in safeguarding the local area from potential water-related disasters.
Year Completed |
1981 |
Dam Length |
3000 |
Dam Height |
27 |
River Or Stream |
COLE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
41.7 |
Drainage Area |
4.83 |
Nid Storage |
1260 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cedar C Nr Cedar Point
|
61cfs |
Cottonwood R Nr Florence
|
215cfs |
Whitewater R At Towanda
|
64cfs |
Cottonwood R Nr Plymouth
|
898cfs |
N Cottonwood R Bl Marion Lk
|
1cfs |
Otter C At Climax
|
22cfs |
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.
Frd No 21