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Lake Loramie Dam

Location and Description

Lake Loramie Dam is part of Lake Loramie State Park located in Shelby County and was built in 1844 to impound a feeder lake to the Miami & Erie Canal. The dam has a maximum height of 23.3 feet that carries a portion of State Route 362.

The dam has a 220-foot-long concrete spillway that discharges water from the lake into Loramie Creek. As a Class I high-hazard potential structure, a sudden failure of Lake Loramie Dam likely would result in the structural collapse of at least one residence or one commercial or industrial business and probable loss of human life. (Hazard ratings refer to the consequences of dam failure, not the dam's condition.)

Click here for more about the Dam Risk Reduction Program.

Risk Reduction Construction Photos as of May 7, 2018

Risk Reduction Construction Photos as of April 2018

Risk Reduction Construction Photos as of 12/11/2017


Risk Reduction Construction Photos as of 10/26/2017

Risk Reduction Construction Photos as of 5/10/2017

Risk Reduction Construction Photos as of 2/23/2017

Lake Loramie Dam: Statistics (previous structure)

Prior to completion of dam risk reduction construction the dam included these characteristics.

  • Maximum Embankment Height: 23 feet
  • Length of Dam: 6,575 feet
  • Crest Width: 20 feet
  • Reservoir Surface Area At Top Of Dam: 3,100 acres
  • Storage Capacity at Principal Spillway Elevation: 983 million gallons
  • Principal Spillway Type: Concrete weir
  • Emergency Spillway: None
  • Principal Spillway Crest Elevation: 995 feet
  • Reservoir Surface Area at Principal Spillway: 819 acres
  • Lake Drains: (2) 4 foot by 5 foot gates
  • Dam Classification: Class I
  • Lake Constructed: 1844
  • Lake Inflow: Loramie Creek
  • Total Drainage Area To Lake: 77.7 square miles
  • Lake Outflow: Loramie Creek
  • Counties: The site is located in Shelby County at Lake Loramie State Park
  • Communities: Minster, Fort Loramie

Safety Issues

Lake Loramie Dam currently has deficiencies that must be addressed to bring it into compliance with state dam safety standards. The deficiencies include insufficient storage-discharge capacity, seepage and instability concerns at the concrete spillway and along the entire embankment, the walkway over the spillway, inoperable lake drain gates, and presence of trees and brush on the dam.

Risk Reduction

ODNR contracts with Stantec Consulting Services to provide investigations and preliminary design alternatives. Their investigations of the dam structure reveal the concrete spillway is deteriorated and has a very low safety level. Due to complex issues and a potentially time consuming process to address all the deficiencies, ODNR has proceeded with an incremental approach by preparing a final design to replace the existing spillway, reduce seepage and increase embankment stability. The new spillway will have similar height and flow characteristics as the existing spillway.

Long Term Plan

Routine inspections and maintenance of the dam will continue. An emergency action plan will be revised and shared with local emergency management officials once it is completed.

Media Coverage

To request more information you may write to:

Ohio Department of Natural Resources
Dam Risk Reduction Project
2045 Morse Road, Building E-3
Columbus, Ohio 43229

or send an email communication to