Gs Dd No N-5 Reservoir Report

Last Updated: December 6, 2025

Gs Dd No N-5 is a local government-owned dam located in Valley Falls, Kansas, designed by P.E.


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Summary

Wilbur Naylor. Completed in 1996, this Earth-type dam serves the primary purpose of flood risk reduction along the Nebo Creek-TR. With a height of 28 feet and a length of 600 feet, the dam has a storage capacity of 224.8 acre-feet and a drainage area of 0.79 square miles.

Despite its low hazard potential and moderate risk assessment, Gs Dd No N-5 has not been rated in terms of its condition assessment. The dam features an uncontrolled spillway with a width of 70 feet and has no outlet gates or associated structures. The last inspection took place in November 1995, with no subsequent inspections scheduled. The dam is regulated and permitted by the Kansas Department of Agriculture, with state jurisdiction and enforcement in place.

Water resource and climate enthusiasts will appreciate the critical role Gs Dd No N-5 plays in mitigating flood risks in the area. Its strategic location in Jackson County, Kansas, ensures protection against potential inundation events, with a focus on debris control and flood risk reduction. As a vital piece of infrastructure, the dam underscores the importance of effective water management practices in safeguarding communities and ecosystems against the impacts of extreme weather events.

Year Completed

1996

Dam Length

600

Dam Height

28

River Or Stream

NEBO CREEK-TR

Primary Dam Type

Earth

Surface Area

7.8

Drainage Area

0.79

Nid Storage

224.8

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

28
       
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.