I-64 High Rise Bridge Sound Barrier
Highways & Roads
Project details
843,000 SF post-and-panel sound barrier system on I-64 in Virginia for a state DOT noise abatement project.

Engineering and Materials for Your Retaining Wall Projects
Earth Retention provides PE-stamped retaining wall engineering, materials supply, and construction support for commercial, transportation, and institutional projects across the United States. Founded in 2009 by Chad Clark, PE, Earth Retention has grown to a team of six licensed Professional Engineers registered in 40+ states, completing 500+ projects per year and more than 25 million square feet of retaining wall designs. Earth Retention handles the full project cycle under one roof: preliminary design and constructability review, final PE-stamped construction drawings, coordinated materials supply, and RFI support through construction.
Chad ClarkFounder
Lance CarterChief Engineer
PE-stamped retaining wall engineering from preliminary layout through construction-ready shop drawings, delivered in-house by licensed engineers in 40+ states. Every design is led, reviewed, and stamped by Earth Retention engineers without third-party intermediaries.
Modular block facing with geogrid reinforcement for commercial, residential, and DOT projects.
Precast concrete panels with steel or geosynthetic reinforcement, designed per AASHTO LRFD for DOT and heavy highway applications.
Steel piles with timber or concrete lagging for permanent and temporary excavation support and cut walls.
Top-down construction for cut slopes and excavation support, including tieback alternatives for constrained sites.
Hot-dipped galvanized welded wire forms with geogrid reinforcement and rock fill, a proprietary Earth Retention system with projects reaching over 70 feet tall and more than 5 million SF installed.
Cantilever soldier pile systems with precast concrete panels for state DOT noise abatement projects.
Geogrid-reinforced steep slopes for embankment stabilization, designed per AASHTO and FHWA guidelines.
Earth Retention supplies geogrid, geotextiles, welded wire forms, facing systems, and accessories coordinated with designs and delivered to site. American-made options are available from U.S.-based manufacturers.
Engineering support from pre-construction through final inspection, including RFI turnaround, field modifications, and real-time problem-solving. Earth Retention serves as a Design-Assist Partner on large-scale projects, working alongside general contractors and developers during preconstruction.
Proprietary MSE wall design and drafting tools.
Workshops and lunch-and-learn training for retaining wall professionals offering up to 7 PDH credits, available on-site or on request.
Highways & Roads · Commercial · Land Development · Bridges · Data Centers
Highways & Roads
843,000 SF post-and-panel sound barrier system on I-64 in Virginia for a state DOT noise abatement project.
Highways & Roads
Retaining wall engineering on the I-4 Ultimate project in Florida.
Freight & Logistics · Client: CSX
Retaining wall design and supply for CSX Intermodal facility construction.