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East Reservoir-Portage Lakes

Location and Description

East Reservoir is part of Portage Lakes State Park located near Akron in Summit County. It was built around 1840 as a water supply reservoir for the Ohio and Erie Canal. The 1,400-foot long dam consists of three distinct sections with a maximum crest width of 40-50 feet and impounds approximately 900 surface acres of water. It discharges water flow into the 1,500-foot long “Iron Channel” that connects to West Reservoir. As a Class I high-hazard potential structure, a sudden failure of East Reservoir Dam likely would result in the structural collapse of at least one residence or commercial/industrial business and loss of human life. (Hazard ratings refer to the consequences of dam failure; not the dam’s condition.)


East Reservoir Dam Rehabilitation Q & A (53 KB PDF)


Click here for more about the Dam Risk Reduction Program.

East Reservoir Dam: Statistics

  • Maximum Embankment Height: 24.8 feet
  • Length of Dam: (3) separate sections of 200 feet, 925 feet and 275 feet = 1,400 feet total
  • Crest Width: 50 feet
  • Reservoir Surface Area At Top Of Dam: 900 acres
  • Principal Spillway Type: Ogee
  • Emergency Spillway: None
  • Principal Spillway Crest Elevation: 989.0 feet above mean sea level
  • Reservoir Surface Area at Principal Spillway Elevation: 6,896 acres
  • Lake Drains: (2) spillways; north spillway is 28-foot long concrete weir; south spillway is 21-foot long concrete weir.
  • Dam Classification: Class I
  • Lake Constructed: About 1840
  • Lake Inflow: Miller Lake, West Reservoir
  • Lake Outflow: Iron Channel
  • Counties: The site is located near Akron in Summit County at Portage Lakes State Park
  • Communities: Coventry Township, Summit County

Safety Issues

East Reservoir Dam currently has deficiencies that must be addressed to bring the dam into compliance with dam safety standards. The deficiencies include insufficient storage/discharge capacity and it cannot pass the required design storm safely. Excessive and uncontrolled seepage through and under the embankment, especially at higher lake levels, along with severe concrete deterioration on the north spillway and lake drain structure also are present.

Risk Reduction

ODNR contracted with Tetra Tech to provide investigations, preliminary design and final design alternatives. Their investigations of the dam structure in 2013 and subsequent study revealed various deficiencies that require remediation. Final design will be completed in early 2017 and include risk reduction measures intended to bring the dam and its appurtenances into compliance with dam safety standards and industry best management practices.

Long Term Plan

ODNR contracted with Tetra Tech to provide investigations, preliminary design and final design alternatives. Their investigations of the dam structure in 2013 and subsequent study revealed various deficiencies that require remediation. Final design will be completed in early 2017 and include risk reduction measures intended to bring the dam and its appurtenances into compliance with dam safety standards and industry best management practices.

Status

Tetra Tech is contracted to ODNR to provide preliminary and final designs, Emergency Action Plans (EAPs) and operation, maintenance and inspection (OMI) guidelines for East Reservoir Dam, North Reservoir Dam and the Long Lake Floodgates. Limited soil borings have been performed; the design process for East Reservoir will be completed in early 2017 with construction anticipated to start in Spring, 2017. (Posted 12/05/2016)

Status Update Posts


Additional park information may be found on the Portage Lakes State Park system web page.

News

Media Coverage

Supporting Documents

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 DamRiskReduction@dnr.state.oh.us.