Dd No H-21 Reservoir Report
Nearby: Garnett City Dam Cedar Creek
Last Updated: December 13, 2025
Dd No H-21 is a local government-owned earth dam located in Lane, Kansas, along the Pottawatomie Creek-TR.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1985, this dam serves primarily for flood risk reduction purposes and has a height of 37.6 feet and a length of 610 feet. With a storage capacity of 498 acre-feet, Dd No H-21 has a moderate hazard potential and is currently rated as "Not Rated" in terms of condition assessment.
Managed by the Kansas Department of Agriculture, this dam is regulated, permitted, inspected, and enforced by state authorities. The primary designer of Dd No H-21 is the USDA NRCS, with oversight from the Natural Resources Conservation Service. The dam features an uncontrolled spillway type with a width of 40 feet and a surface area of 12.9 acres, serving a drainage area of 1.28 square miles. Despite its low hazard potential, the dam's risk assessment categorizes it as moderate, indicating the need for ongoing risk management measures.
Although Dd No H-21 does not have a designated Emergency Action Plan (EAP) or inundation maps prepared, it meets state guidelines and is subject to regular monitoring and maintenance. With its strategic location and crucial role in flood risk reduction for the local community, this dam stands as a vital infrastructure for water resource management and climate resilience in Anderson County, Kansas.
Year Completed |
1985 |
Dam Length |
610 |
Dam Height |
37.6 |
River Or Stream |
POTTAWATOMIE CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
12.9 |
Drainage Area |
1.28 |
Nid Storage |
498 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pottawatomie C Nr Scipio
|
15cfs |
Pottawatomie C At Lane
|
13cfs |
Marais Des Cygnes R Nr Ottawa
|
53cfs |
Marais Des Cygnes R Nr Pomona
|
14cfs |
Marais Des Cygnes R At La Cygne
|
114cfs |
Marais Des Cygnes R At Melvern
|
20cfs |
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 H-21