Empire Mine Tailings Basin Dam

Significant HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateMichigan
CountyMarquette
Nearest CityGwinn
River/StreamGreen Creek
Coordinates46.38667, -87.63333

Physical Characteristics

Dam TypeEarth
NID Height163 ft
Dam Height163 ft
Dam Length27,800 ft
Year Completed1975 (51 years old)

Storage & Hydraulics

NID Storage117,000 acre-ft
Max Storage117,000 acre-ft
Normal Storage10,000 acre-ft
Surface Area940 acres
Drainage Area5 sq mi
Max Discharge80 cfs
Spillway TypeControlled

Ownership & Safety

PurposeTailings
OwnerEmpire Iron Mining Partnership
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentSatisfactory
Last Inspection09/30/2019
Emergency Action PlanYes

Identifiers

NID IDMI00719
Federal IDMI00719
More InfoState Dam Safety Program

Nearby Dams

Empire Mine Secondary Pond Dam 0.2 mi Low Empire Mine Tertiary Pond Dam 0.3 mi Low Empire Mine Expanded Tertiary Dam 1.5 mi Significant Schweitzer Dam 1.9 mi Significant Etb Waterway Dams 2.3 mi Low Hoover Pond Dam 2.8 mi Low Tilden Recirculation Basin 3.1 mi High Lake Sally Dam 5.9 mi High Ogden Lake Dam 5.9 mi High Gribben Tailings Basin Dam 6.4 mi Significant