Summary
The dam, with a height of 23 feet and a length of 1555 feet, serves the primary purpose of flood risk reduction along Dow Creek. With a storage capacity of 661.58 acre-feet and a normal storage volume of 68.89 acre-feet, the dam plays a crucial role in mitigating flood hazards in the area.
Managed and regulated by the Kansas Department of Agriculture, Dd No 20 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam has a spillway width of 120 feet and is classified as an uncontrolled spillway type. Despite not having outlet gates, the structure is designed to effectively manage water flow during heavy rainfall events. The risk assessment for Dd No 20 is moderate, indicating a potential for moderate consequences in the event of a failure.
Overall, Dd No 20 is a vital infrastructure for flood risk reduction in Lyon County, Kansas. Its strategic location along Dow Creek and its efficient design make it an essential component of the local water resource management system. As climate change continues to impact precipitation patterns and increase the frequency of extreme weather events, structures like Dd No 20 play a crucial role in protecting communities and infrastructure from flooding and its associated risks.
Year Completed |
2001 |
Dam Length |
1555 |
Dam Height |
23 |
River Or Stream |
DOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
19.19 |
Nid Storage |
661.58 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Neosho R Nr Americus
|
75cfs |
Marais Des Cygnes R Nr Reading
|
10cfs |
Cottonwood R Nr Plymouth
|
898cfs |
Neosho R At Council Grove
|
4cfs |
Dragoon C Nr Burlingame
|
7cfs |
Salt C At Lyndon
|
9cfs |
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 20