Dd No 121 (Depoe) Reservoir Report
Nearby: Dd No 122 Mildred Lake Dam
Last Updated: December 12, 2025
Dd No 121 (Depoe), also known as Deer Creek WS Joint District No 55, is a local government-owned structure in Lone Elm, Kansas, designed by USDA NRCS.
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Summary
This dam is regulated by the Kansas Department of Agriculture and serves the primary purpose of flood risk reduction along the Deer Creek-TR. With a height of 20 feet and a storage capacity of 425.09 acre-feet, Dd No 121 plays a crucial role in managing water resources and protecting the surrounding area from potential flooding events.
Constructed with an earth core and buttress type, Dd No 121 has a relatively low hazard potential and a moderate risk assessment ranking. The dam features an uncontrolled spillway with a width of 129 feet and a maximum discharge of 782 cubic feet per second. Despite not being rated for its condition, Dd No 121 has not been inspected since December 1999. While the dam has not undergone modifications in recent years, it remains a key infrastructure for water resource management in Anderson County, Kansas.
As water resource and climate enthusiasts continue to monitor and assess the impact of dams like Dd No 121 on local ecosystems and communities, ensuring the safety and effectiveness of such structures becomes paramount. With its strategic location and design characteristics, Dd No 121 stands as a testament to the collaborative efforts of federal and state agencies in managing flood risks and safeguarding water resources in the region.
Dam Length |
1230 |
Dam Height |
20 |
River Or Stream |
DEER CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
23.14 |
Hydraulic Height |
16 |
Nid Storage |
425.09 |
Structural Height |
20 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Neosho R Nr Iola
|
944cfs |
Pottawatomie C Nr Scipio
|
15cfs |
Marmaton R Nr Uniontown
|
0cfs |
Pottawatomie C At Lane
|
13cfs |
L Osage R At Fulton
|
1cfs |
Neosho R At Burlington
|
1190cfs |
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 121 (Depoe)