Rock Slope Cut Engineering

South Berwick, ME

Stephens Associates Consulting Engineers (SA) provided geotechnical engineering for subsurface investigation, evaluation, and alternatives analsyis for a rock cut slope in southern Maine.

SA managed a complex, multi-phased, subsurface investigation program in steep, difficult-access terriain, and used an optical televiewer (downhole camera) to capture a continuous image of the inside of each borehole and assist in identification of rock joint orientations.

We evaluated rock slope stability for various slope configurations in consideration of the measured rock joint orientations, laboratory test strength results for intact rock and rock joints, site groundwater levels from observation wells, failure mode, and structural support.

We estimated costs and schedule for the alternatives based on discussions with local specialty contractors and published unit costs, and evaluated the impact of the alternatives on stormwater permitting.