Pleasant Hill Slope Stabilization Project
General

Problem Description

Severe erosion and slope stability concerns adjacent to residential structures at Pleasant Hill Lake in Ashland County have spurned a geotechnical investigation to determine the cause for slope instabilities.  Thousands of tons of shoreline material have washed into Pleasant Hill Reservoir as a result of these instabilities.

Phase 1 of this project involves data collection and identification of the slope instability causes.  This phase began in Fall of 2009, with an engineering report expected in early 2010.  Potential solutions will then be presented and analyzed.

Solution Description

MWCD has contracted with BBC&M Engineering (Columbus) and CT Engineering (Akron) to identify the cause(s) behind the slope instabilities as well as to propose potential solutions.  The project is located along the southern shoreline of Pleasant Hill Reservoir near the Pine Hill area.  Project photos show the severity of the slope instability problems.

Scope

Phase 1 (completed) - Identify the cause of the slope instability through such methods as:

• Site reconnaissance and field surveys of public boundaries
• Subsurface investigation including laboratory anaylsis and slope instrumentation study and
• Geotechnical and hydraulic analysis of existing site conditions.

Phase 2 (underway) - Analyze potential solutions.

Phase 3 - Implement solution(s).

Location Information

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Activity Log

Engineers from BBC&M and CT Consultants along with MWCD Engineering Department staff met with homeowners from the Pine Hill area in mid-November, 2009 to introduce the project and solicit preliminary feedback.  Phase I of the project is complete and an analysis of geotechnical data is being used to develop a solutions matrix.  Possible solutions were presented to homeowners in March, 2010.  Total projected costs are $2.0 - $2.5 million.  MWCD staff are working with the U.S. Army Corps of Engineers, FEMA, and Ohio EPA to obtain possible state/federal dollars to fund the project.

Project costs through May 31, 2010 are $268,791. 

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