Dd No 108 Reservoir Report

Last Updated: December 16, 2025

Dd No 108 is a local government-owned dam in Cowley, Kansas, designed by Booker Freud and completed in 1990.


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Summary

This earth dam, standing at a height of 34 feet and stretching 1050 feet in length, serves the primary purpose of flood risk reduction along the Little Crabb Creek. With a storage capacity of 1108.6 acre-feet and a surface area of 18.6 acres, the dam plays a crucial role in managing water flow and reducing the risk of flooding in the area.

Located in the city of Silverdale, Dd No 108 is regulated by the Kansas Department of Agriculture and undergoes state permitting, inspection, and enforcement to ensure its structural integrity and functionality. Despite having a low hazard potential and a moderate risk assessment rating, the dam is not currently rated for its condition. With a spillway width of 110 feet and a maximum discharge capacity of 2752 cubic feet per second, Dd No 108 is equipped to manage excess water flow and reduce the impact of potential flooding events in the region.

For water resource and climate enthusiasts, Dd No 108 represents a vital infrastructure asset in managing water resources and mitigating flood risks in Cowley, Kansas. As a key component in the local flood risk reduction strategy, this dam serves as a testament to the importance of proactive water management practices in safeguarding communities and ecosystems against the impacts of extreme weather events and changing climate patterns. With its regulated operation and strategic location along the Little Crabb Creek, Dd No 108 plays a critical role in ensuring water security and resilience in the face of climate-related challenges.

Year Completed

1990

Dam Length

1050

Dam Height

34

River Or Stream

LITTLE CRABB CREEK

Primary Dam Type

Earth

Surface Area

18.6

Drainage Area

3.6

Nid Storage

1108.6

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

34
       
Seasonal Comparison

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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.