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Indian Lake Dam

Location and Description

Indian Lake Dam is part of Indian Lake State Park located in Logan County and was built in 1852 to impound a feeder lake to the Miami & Erie Canal. The dam has a maximum height of about 16 feet that carries a portion of State Route 366.

The dam has a 700-foot-long concrete spillway that discharges water from the lake into the Great Miami River. As a Class I high-hazard potential structure, a sudden failure of Indian Lake 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.

Visit the Indian Lake State Park page.

Indian Lake Dam: Statistics (previous structure)

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

  • Maximum Embankment Height: 16 feet
  • Length of Dam: 3,960 feet
  • Crest Width: 20 feet
  • Reservoir Surface Area at Top of Dam: 7,120 acres
  • Storage Capacity at Principal Spillway Elevation: 2,126 acre-feet = 15 billion gallons
  • Principal Spillway Type: Concrete ogee weir
  • Emergency Spillway: None
  • Principal Spillway Crest Elevation: 995.8 feet
  • Reservoir Surface Area at Principal Spillway: 5,063 acres
  • Lake Drains: (2) 48-inch concrete conduits
  • Dam Classification: Class I
  • Lake Constructed: 1852
  • Lake Inflow: Great Miami River
  • Total Drainage Area to Lake: 98.35 square miles
  • Lake Outflow: Great Miami River
  • County: Logan
  • Communities: Lakeview, Russells Point

Safety Issues

Indian Lake Dam currently has deficiencies that must be addressed to bring the dam 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 presence of trees and brush on the dam also are a safety issue; these materials were removed in early 2016.

Risk Reduction

ODNR is contracted with Stantec Consulting Services to provide investigations, preliminary design alternatives and final design. Their recent investigations of the dam structure revealed 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 of the dam 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 the same dimension and crest elevation as the existing one that results in no change to the dam's existing hydraulic operations or lake levels.

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.


Indian Lake Historic Construction Progress Photos






Additional park information may be found on the Indian Lake State Park web page.

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