Gs Dd No 118 Reservoir Report

Last Updated: December 27, 2025

Gs Dd No 118 is a local government-owned dam located in Lawrence, Kansas, designed by P.E.


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Summary

Wilbur Naylor. Completed in 1994, this earth dam stands at a height of 31 feet and spans 500 feet in length, serving the primary purpose of flood risk reduction along the Lynn Creek-Tr river/stream. With a normal storage capacity of 27.3 acre-feet and a maximum discharge of 531 cubic feet per second, the dam has a low hazard potential and is currently rated as not assessed for condition.

Managed by the Kansas Department of Agriculture, this dam is regulated, permitted, inspected, and enforced by the state, ensuring compliance with safety standards. The dam has a moderate risk assessment rating of 3, indicating the need for appropriate risk management measures. While no emergency action plan (EAP) has been prepared or updated for this dam, it meets regulatory guidelines and is equipped with an uncontrolled spillway to manage excess water flow. Overall, Gs Dd No 118 plays a crucial role in debris control and flood risk reduction within the Shawnee County area, contributing to the water resource management efforts in the region.

Year Completed

1994

Dam Length

500

Dam Height

31

River Or Stream

LYNN CREEK-TR

Primary Dam Type

Earth

Surface Area

5.5

Drainage Area

0.65

Nid Storage

176.2

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

31
       
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.