Grasshopper Gulch Walleye Pond Dam Reservoir Report

Last Updated: December 5, 2025

Grasshopper Gulch Walleye Pond Dam, located in Rapid River, Michigan, is a state-regulated earthen dam completed in 1981 for purposes other than flood control or irrigation.


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Summary

The dam stands at a height of 20 feet with a hydraulic height of 19 feet and a length of 800 feet, creating a reservoir with a storage capacity of 70 acre-feet. The dam is situated on a tributary to Tacoosh River and is under the jurisdiction of Michigan's Department of Environment, Great Lakes, and Energy (DEGLE).

This low-hazard dam has a satisfactory condition assessment and is inspected every five years, with the last inspection conducted in September 2016. The dam's spillway, which is uncontrolled, has a width of 10 feet and a maximum discharge capacity of 50 cubic feet per second. The dam's risk assessment indicates a moderate risk level, with necessary risk management measures likely in place. Grasshopper Gulch Walleye Pond Dam plays a crucial role in water resource management in the area, providing recreational opportunities and supporting aquatic habitats while ensuring the safety of surrounding communities in Delta County, Michigan.

Year Completed

1981

Dam Length

800

Dam Height

20

River Or Stream

Trib to Tacoosh River

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

19

Drainage Area

0.3

Nid Storage

70

Structural Height

20

Hazard Potential

Low

Nid Height

20
       
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.