ANDROSCOGGIN RIVER TRAIL

  • Project Location: Lisbon, ME

  • Services Provided:
    • Geotechnical consulting.
  • Project Summary:
    • The project consists of a 2.13-mile bicycle and pedestrian walkway with retaining walls, culvert crossings, and an embankment 15 feet in height for a 150-foot wetland crossing. 
  • Project Challenges / Innovation: 
    • Geotechnical challenges included swamp deposits (peat) and marine deposits (soft clay) contributing to reduced bearing capacity, settlement, and slope stability limitations. 
    • Designed an embankment section with slopes of 1H:1V utilizing geotextile, riprap, and engineered fill. 
    • In addition to the geotechnical investigation, completed designs for 503 feet of Stone Strong gravity retaining walls and a box culvert using LRFD methodology. 
    • Designed for a reinforced soil slope using a Geoweb© retaining system by Presto Geosystems for a slope 176 feet in length and 20 feet in height.
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