Dd No 18 Reservoir Report
Nearby: Dd No 17 (Nedwed) Dd No 21
Last Updated: December 5, 2025
Dd No 18 is a crucial flood risk reduction structure located in Pottawatomie County, Kansas.
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Summary
Built in 1999, this earth dam spans 700 feet in length and stands at a height of 38 feet, with a storage capacity of 840.4 acre-feet. The dam plays a key role in protecting the surrounding area from flooding, with a primary purpose of debris control and flood risk reduction.
Managed by the local government, Dd No 18 is regulated by the Kansas Department of Agriculture and undergoes regular inspections to ensure its structural integrity. Despite being classified as having a significant hazard potential and an unsatisfactory condition assessment, the dam continues to serve its purpose effectively. With a moderate risk level and a history of inspections dating back to April 2017, Dd No 18 remains a critical component of the flood control infrastructure in the region, safeguarding the community from potential water-related disasters.
Year Completed |
1999 |
Dam Length |
700 |
Dam Height |
38 |
River Or Stream |
WILSON CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
23.3 |
Drainage Area |
2.88 |
Nid Storage |
840.4 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Rock C Nr Louisville
|
16cfs |
Big Blue R Nr Manhattan
|
396cfs |
Vermillion C Nr Wamego
|
11cfs |
Black Vermillion R Nr Frankfort
|
37cfs |
Kansas R At Wamego
|
1600cfs |
Fancy C At Winkler
|
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.
Dd No 18