S&ME completed a preliminary engineering phase through the final design phase of an approximately 600-foot long active landslide along State Route 772 in Ross County, Ohio. The preliminary engineering phase included investigation of the soil and rock within the landslide, survey of the existing topography, installation and monitoring of inclinometers and groundwater monitoring wells, analyses and cost estimates of remediation alternatives, and preliminary design of a drilled shaft retaining wall. The final design phase included utility location/coordination, right-of-way plans, cost estimates, a culvert replacement design, and a wall design.
For the Geotechnical Investigation, S&ME performed a total of 13 borings, including 2 borings for a replacement culvert. Boring depths ranged from 24 feet to 54 feet and at least 10 feet of rock coring was performed in all borings except the two culvert borings. Six inclinometers and two groundwater monitoring wells were installed and monitored for a period exceeding a year. S&ME performed strength testing on recovered bedrock and undisturbed samples of soil. S&ME also performed slope stability analyses on critical cross-sections. The project was performed following ODOT’s Project Development Process (PDP) including Steps 1 through 8 – Stages 1 through 3 and Final Tracings.
