Dd No 6-9 Reservoir Report

Last Updated: December 14, 2025

Dd No 6-9, located in Coffey County, Kansas, is a local government-owned dam designed by King Engineering for flood risk reduction along School Creek.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 2007, this earth dam stands at a height of 35.3 feet and has a length of 3000 feet, providing a normal storage capacity of 257 acre-feet and a maximum storage of 2400 acre-feet. With a surface area of 57.2 acres and a drainage area of 4.7 square miles, Dd No 6-9 plays a crucial role in mitigating flood risks in the region.

The dam, classified as having a significant hazard potential and fair condition assessment, is regulated by the Kansas Department of Agriculture and undergoes inspections every five years. While it has no outlet gates or locks, an uncontrolled spillway with a width of 120 feet is in place to manage excess water flow. Dd No 6-9 is situated within the Kansas City District of the US Army Corps of Engineers and falls under the jurisdiction of Representative Steven C. Watkins, Jr.

Despite its fair condition, the dam poses a moderate risk (level 3) according to a risk assessment. Emergency action plans, inundation maps, and risk management measures for Dd No 6-9 are currently unspecified, highlighting the need for ongoing monitoring and maintenance to ensure the safety and effectiveness of this vital infrastructure for flood protection in Coffey County.

Year Completed

2007

Dam Length

3000

Dam Height

35.3

River Or Stream

SCHOOL CREEK

Primary Dam Type

Earth

Surface Area

57.2

Drainage Area

4.7

Nid Storage

2400

Outlet Gates

None

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

35
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.