Gsd No B-71 (Gc 10) Reservoir Report

Last Updated: December 10, 2025

Gsd No B-71 (Gc 10) is a local government-owned earth dam located in Atchison, Kansas, with a primary purpose of flood risk reduction.


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Summary

The dam stands at a height of 29.5 feet and has a length of 970 feet, providing a maximum storage capacity of 221 acre-feet. It serves to control debris and reduce the risk of flooding in the area, with a low hazard potential and a moderate risk assessment rating.

Managed by the Kansas Department of Agriculture, Gsd No B-71 (Gc 10) is regulated, permitted, inspected, and enforced by the state, ensuring its structural integrity and safety. The dam features an uncontrolled spillway with a width of 40 feet and has a drainage area of 0.72 square miles. Despite not having outlet gates, the dam has a normal storage capacity of 76 acre-feet and a surface area of 13 acres, contributing to the overall flood risk reduction efforts in the region.

Situated within the Rock Island District, Gsd No B-71 (Gc 10) plays a crucial role in mitigating the impact of potential flooding events in Atchison, Kansas. With its designed buttress core type and unknown foundation, the dam remains a key infrastructure for water resource and climate enthusiasts interested in understanding the local flood risk management measures implemented in the area.

Dam Length

970

Dam Height

29.5

Primary Dam Type

Earth

Surface Area

13

Drainage Area

0.72

Nid Storage

221

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

30
       
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.
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