Geotech Report - Canaan Valley Valley Trail Improvements.pdf

The document is a geotechnical exploration report prepared by American Geotech, Inc. for Chapman Technical Group, focusing on the proposed ADA Observation Deck and Ramp project at Canaan Valley State Park Resort in Davis, West Virginia. The report details eleven soil probe locations exploring subsurface conditions for a new ADA-compliant trail with a wooden observation platform, deck, and boardwalk structures. The project involves constructing a 5-foot wide boardwalk that will run along the northwestern bank of Bubbling Spring, with an 8 x 12 foot deck overlooking the stream and bog area, and a 16 x 16 foot observation platform elevated 8 feet above ground level.

The geotechnical investigation revealed challenging site conditions, including wetland soils that are not suitable for shallow foundation support. The report recommends using helical pier foundations extended 5-6 feet below the existing surface to provide stable support. The soil profile consists primarily of dark brown sandy silt loam that is damp to wet and soft, with groundwater present at shallow depths. The report includes detailed recommendations for foundation design, including using galvanized steel helical piers, specific installation requirements, and considerations for potential construction challenges such as tree roots and seasonal moisture variations. The investigation was conducted on August 2, 2024, and provides critical engineering guidance for the accessible trail and observation structure's design and construction.