Back-Up Water Supply Reservoir Report

Last Updated: December 6, 2025

Back-Up Water Supply, also known as Yates Center City Dam, is located in Woodson County, Kansas, along the South Owl Creek.


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Summary

This earth-type dam, with a height of 36 feet and a hydraulic height of 39 feet, was completed in 1936 to serve as a critical water supply source for the local community of Petrolia. With a storage capacity of 2015.6 acre-feet, this dam plays a vital role in maintaining a reliable water source for the region.

Despite its importance, Back-Up Water Supply has a high hazard potential due to its structural design and location. Although not currently rated in terms of condition assessment, regular inspections are conducted to ensure its safety and functionality. The dam's spillway, which is uncontrolled and 107 feet wide, helps manage water flow during periods of excess water, further highlighting its significance in water resource management.

Given its moderate risk assessment rating and the potential impact of a dam failure, it is crucial for local authorities to have emergency action plans in place to mitigate any potential risks. The dam's association with the local government underscores the importance of community involvement in ensuring the safety and sustainability of this vital water infrastructure. As climate change continues to impact water resources, the Back-Up Water Supply serves as a critical lifeline for the region's water supply needs.

Year Completed

1936

Dam Length

1000

Dam Height

36

River Or Stream

SOUTH OWL CREEK

Primary Dam Type

Earth

Hydraulic Height

39

Drainage Area

4.48

Nid Storage

2015.6

Structural Height

41

Outlet Gates

None

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

41
       
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.