Groveland Dam #8 Reservoir Report

Last Updated: December 5, 2025

Groveland Dam #8, also known as Groveland Mine Tailings Dam #8, is a state-regulated earth dam located in Loretto, Michigan.


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Summary

Completed in 1977, this dam serves the primary purpose of recreation, offering opportunities for outdoor enthusiasts to enjoy activities such as boating and fishing on the Pine Creek river. With a height of 60 feet and a length of 2000 feet, Groveland Dam #8 has a storage capacity of 11,232 acre-feet and covers a surface area of 390 acres.

Despite being classified as having a low hazard potential and fair condition assessment, Groveland Dam #8 is subject to regular inspections by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE) to ensure its structural integrity and safety. The dam features an uncontrolled spillway with a width of 12 feet, and its risk assessment is moderate. The surrounding area is at a moderate risk level (3), prompting the need for ongoing risk management measures to mitigate potential hazards and ensure the safety of the community.

Overall, Groveland Dam #8 stands as a vital water resource in Dickinson County, Michigan, providing both recreational opportunities and essential water storage for the region. By adhering to state regulations and undergoing regular inspections, this dam continues to play a crucial role in water management and environmental protection efforts in the area, making it a significant site for water resource and climate enthusiasts to appreciate and monitor.

Year Completed

1977

Dam Length

2000

Dam Height

60

River Or Stream

Pine Creek

Primary Dam Type

Earth

Surface Area

390

Hydraulic Height

54

Drainage Area

5.8

Nid Storage

11232

Structural Height

60

Hazard Potential

Low

Nid Height

60
       
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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.