Gs Dd No 109 Reservoir Report

Last Updated: December 6, 2025

Gs Dd No 109 is a crucial flood risk reduction structure located in Lawrence, Kansas, along the Rock Creek-TR.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1985 by designers Speaker & King, this earth dam stands at a height of 31 feet and has a length of 670 feet, providing a storage capacity of 168 acre-feet. With a low hazard potential and moderate risk assessment, this dam plays a vital role in controlling debris and reducing flood risks in the area.

Managed by the Kansas Department of Agriculture, Gs Dd No 109 is state-regulated, permitted, inspected, and enforced for safety and compliance. The dam features an uncontrolled spillway with a width of 53 feet and has a drainage area of 0.37 square miles. While the condition assessment is currently not rated, the dam meets guidelines for emergency action plans and has emergency contacts updated for any potential risks.

With its primary purpose being flood risk reduction, Gs Dd No 109 serves as a crucial infrastructure for protecting the Osage County community in Kansas. Despite its age, the dam continues to be a reliable structure for mitigating potential hazards and ensuring the safety of the surrounding area.

Year Completed

1985

Dam Length

670

Dam Height

31

River Or Stream

ROCK CREEK-TR

Primary Dam Type

Earth

Surface Area

4.3

Drainage Area

0.37

Nid Storage

168

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

31
       
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.