Transportation—Multimodal/Traffic

Geotechnical Team Member
Fender Modifications
Maine State Ferry Terminals
Vinalhaven, Islesboro, Bass Harbor, Swans Island, and Frenchboro, ME

Geotechnical team member for the design of modifications to the fender systems at multiple Maine State Ferry Terminals located throughout Penobscot Bay. Modifications made to lengthen the ferry pens to accommodate larger ferry vessels. Modifications included adding turning and mooring dolphins and wave screens. Each dolphin supported by post-tensioned concrete-filled steel pipe piles that are socketed into bedrock.

SchonewaldEA’s work included:

  • Barge-based subsurface exploration programs at each ferry terminal, laboratory testing programs, and geotechnical analyses
  • Developed design recommendations for turning dolphins and mooring dolphins (pipe piles and rock anchors), and wave screens (timber piles)
  • Prepared construction specifications for pipe pile and rock anchor installation
  • Provided construction phase support for pipe pile and rock anchor installation

SchonewaldEA retained by HNTB

Geotechnical Team Member
Heavy Haul Road
International Marine Terminal
Portland, ME.

Geotechnical team member for the design of a half-mile-long haul road for heavy, off-road freight vehicles to connect the International Marine and Merrill’s Terminals. The haul road runs immediately adjacent to a rail line. The Merrill’s Terminal will be used on a regular basis to assist the IMT with its transportation and storage needs. The alignment is underlain by urban fill that contains ash and debris from the great Portland fire.

SchonewaldEA’s work included:

  • Subsurface exploration & laboratory testing programs
  • Data compilation
  • Developed a pavement section that utilizes geocell to thin the section in order to limit excavation of potentially contaminated soils
  • Prepared recommendations for design & construction
  • Prepared design details & special provisions for the pavement section

SchonewaldEA retained by HNTB

Design Lead & Geotechnical Team Member
Stabilization of St. John River Embankment Above Rail Line
Frenchville, ME

SchonewaldEA served as geotechnical team member and lead designer for the design to stabilize a steep slope above an active rail line that had excessive erosion and was prone to further failure, jeopardizing freight rail service.

SchonewaldEA’s work, supported by MaineDOT design detailer, included:

  • Project plan development
  • Special provisions
  • Quantity & cost estimate
  • Geotechnical construction support

SchonewaldEA retained by MaineDOT

Geotechnical Team Member
Intersection Reconstruction and Widening
Riverside Street Lightweight Foamed Concrete Backfill and Embankment T-Wall System
Portland, ME

Completed geotechnical analyses, including stability and settlement analyses, to evaluate the feasibility of constructing a traditional retaining wall with soil backfill to permit widening a major intersection located in Portland. The predicted magnitude of settlement of the soft silt-clay soils underlying the building was unacceptably large.

Subsequently designed a T-wall retaining wall/lightweight foamed concrete fill embankment system to mitigate the settlement concern. Prepared project-specific special provisions for T-Wall and lightweight foamed concrete, and collaborated with prime consultant to develop geotechnical-related plans and details for the retaining wall and lightweight foamed concrete fill system.

Provided geotechnical construction support and geotechnical inspection services during construction.

SchonewaldEA retained by VHB for design phase and by MaineDOT for construction phase

Additional Experience

Additional relevant multimodal and traffic projects for which SchonewaldEA has served as the geotechnical team member or provided significant geotechnical services include the following:

  • VMS board foundations
    Approach to MeTPK Exit 36, Saco and MeTPK mainline, Kittery, ME. (HNTB design lead)
  • Traffic calming measures and pedestrian accommodations
    Route 9 at University of New England, Biddeford, ME (T.Y. Lin International design lead).
  • Container storage yard and rail loading/unloading slab
    International Marine Terminal, Portland, ME. (HNTB design lead)
  • OHSS-related construction claim support
    MeTPK Exit 63 interchange, Gray, ME for Maine Turnpike Authority
  • Subsurface investigation
    Eastport Breakwater Replacement Design-Build Project, Eastport, ME (retained by MaineDOT)
  • Traffic Signal / Overhead Sign Structure Foundations & Intersection Improvements
    Traffic projects throughout Maine, including in Kittery, Old Orchard Beach, Portland, Wiscasset, Thomaston, Orono, Ellsworth, Orland, Waldoboro and along I-295, I-95, and the Maine Turnpike and their approaches.
  • Soil nail wall stabilization system for pedestrian accommodations
    Minot Avenue-Routes 4/100, Auburn, ME (MaineDOT design lead)