Ohio Division of Geological Survey

2045 Morse Rd, Columbus, Ohio 43229 Phone 614-265-6576


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DISCLAIMER

Welcome to the Ohio Department of Natural Resources, Division of Geological Survey,
Lake Erie Geology and Shore Erosion Interactive Map
INTRODUCTION
Structural protection or "hardening" of the Lake Erie shoreline began in the 1800's with the construction of seawalls, jetties, and breakwaters at river mouths and commercial harbors. These structures were designed primarily to improve commercial shipping by creating calm-water areas for anchorage and dockage, and by preventing the shoaling (shallowing) of navigation channels. As harbor towns grew into manufacturing centers, more people began to inhabit land adjacent to the lake. This resulted in a need to protect residential properties from erosion and flooding. During the last 200 years, Ohio's Lake Erie mainland shoreline has been radically modified from its former natural state into a shoreline protected by close to 3,500 protection structures.


Ohio Division of Geological Survey's Shore Structure Inventory

This investigation and inventory of shore-protection structures was initiated in 1996. It began with a compilation of existing shore-structure inventories based on 1870's-vintage shoreline maps, aerial photographs from the 1930's, and an inventory conducted by the Lake Erie Geology Group in the 1970's when shore-protection structures along the entire Ohio coast were systematically visited in the field and described. Following this compilation of earlier work, geologists of the Lake Erie Geology Group revisited, on foot or by boat, all structures along the Ohio coast that were in place between the years 1996 and 2001. An added technological component of the most recent inventory was the collection of differentially corrected Global Positioning System (GPS) coordinates for the end points of each structure. Other information collected by the most recent inventory included data on the type, composition, and estimated dimensions of each structure. Quality-assurance/quality-control checks of spatial data for this investigation began in 2002; GIS compilation of the data was completed in 2004.

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© 2006 Ohio Department of Natural Resources Division of Geological Survey. All Rights Reserved.