Active slope movement was identified during the site investigation phase for the construction of a new fly ash transfer facility at a power plant in West Virginia. The site is located near the base of a large slope and possesses a complex geology. The soils at the site consist of colluvium overlying alluvium deposited adjacent to the Ohio River. The slope above the project site exceeds 75 meters. Instrumentation installed during the site investigation phase identified active slope movement. Construction of the facility required re-grading the site and constructing a 9-meter cut at the base of the hillside. This was made possible through the construction of an anchored soldier pile and lagging retaining wall. The wall was designed to withstand the active landslide. Its performance was assessed with instrumentation that was monitored before, during, and after construction over a period of two years. The data collected suggests that the wall is supporting the landslide load with minimal deflection.
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