Robinson Site Reservoir Report

Last Updated: December 6, 2025

The Robinson Site, located in Allen County, Kansas, is a local government-owned dam built in 2014 for flood risk reduction along the Marmaton River.


°F

°F

mph

Wind

%

Humidity

Summary

This earth dam stands at a height of 30.5 feet and has a storage capacity of 170.6 acre-feet. With a normal storage capacity of 27.8 acre-feet and a surface area of 4.77 acres, the dam plays a crucial role in managing water resources in the region.

Despite being classified as having a low hazard potential, the Robinson Site is subject to state regulations and inspections by the Kansas Department of Agriculture. The dam features an uncontrolled spillway with a width of 40 feet, capable of handling a maximum discharge of 925 cubic feet per second. While the condition of the dam is currently not rated, it serves as a vital infrastructure for flood protection and water resource management in the area.

With its strategic location and design, the Robinson Site offers a moderate level of risk management for potential emergencies, as assessed by a risk rating of 3. Although not operated by the US Army Corps of Engineers, this dam serves as a key structure for flood risk reduction and water resource conservation efforts in Allen County, Kansas.

Year Completed

2014

Dam Length

852

Dam Height

30.5

River Or Stream

MARMATON RIVER-TR

Primary Dam Type

Earth

Surface Area

4.77

Hydraulic Height

28.5

Drainage Area

0.62

Nid Storage

170.6

Structural Height

33.5

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

34
       
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.