Dd No 6-28 Lower Dam (Sedan City Lake) Reservoir Report
Nearby: Upper Dam Frd No 4-35
Last Updated: December 7, 2025
Dd No 6-28 Lower Dam, also known as Sedan City Lake, is a vital structure in Chautauqua County, Kansas, serving multiple purposes such as flood risk reduction and water supply.
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Summary
Completed in 1965, this earth dam stands at a height of 50.1 feet, with a hydraulic height of 53 feet and a structural height of 60 feet, providing a normal storage capacity of 780 acre-feet and a maximum storage capacity of 3,250 acre-feet. Located on Deer Creek, this dam plays a crucial role in managing water resources in the region.
The dam's spillway, with a width of 225 feet, is uncontrolled, and there are no outlet gates associated with the structure. The last inspection conducted in March 2020 rated the dam's condition as fair, with a high hazard potential and a moderate risk assessment. The dam is regulated by the Kansas Department of Agriculture and is subject to state permitting, inspection, and enforcement, ensuring its safe operation and maintenance to mitigate flood risks in the area.
With its proximity to Sedan City and its strategic location on Deer Creek, Dd No 6-28 Lower Dam is a key infrastructure for the community, providing flood protection and water supply for the region. The dam's designers, A&E and USDA SCS, have contributed to its construction and maintenance, highlighting the collaborative efforts involved in managing water resources and climate challenges in Kansas.
Year Completed |
1965 |
Dam Length |
1585 |
Dam Height |
50.1 |
River Or Stream |
DEER CREEK |
Primary Dam Type |
Earth |
Surface Area |
75 |
Hydraulic Height |
53 |
Drainage Area |
7.03 |
Nid Storage |
3250 |
Structural Height |
60 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
60 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Caney R Nr Elgin
|
41cfs |
Elk R At Elk Falls
|
37cfs |
Verdigris R At Independence
|
789cfs |
Caney River Above Coon Creek At Bartlesville
|
63cfs |
Fall R At Fredonia
|
381cfs |
Verdigris R At Coffeyville
|
927cfs |
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.
Dd No 6-28 Lower Dam (Sedan City Lake)