Harris Crossing Shopping Center Retaining Wall & Culvert Crossing

Project Summary
The Harris Crossing Shopping Center is a 52,000-square foot neighborhood center in Wake Forest, North Carolina consisting of a Harris Teeter grocery store, various shops, and multiple outparcels with associated infrastructure. Improvements to the site included construction of a roadway for access to future residential development as well as the shopping center.
Project Description
The Harris Crossing Shopping Center is a 52,000-square foot neighborhood center in Wake Forest, North Carolina consisting of a Harris Teeter grocery store, various shops, and multiple outparcels with associated infrastructure. Improvements to the site included construction of a roadway that would provide access for cars and utilities to future residential development as well as the shopping center. The roadway section consisted of construction of a roadway and a culvert crossing supported by back to back 30 foot MSE segmental block retaining walls. TM Engineering Inc. provided geotechnical engineering consulting services, segmental retaining wall design services, and site and retaining wall construction materials testing and inspections during construction of the development. The challenge for the project was to maximize the available space without effect to the surrounding stream buffer with a product that would safely support a roadway with numerous underground utilities. The walls would also be serving as upstream and downstream headwalls for the culvert crossing. Given the nature of the project, the wall design and installation was important to aid in the aesthetic and economic value as well as providing a structurally sound wall system specific to the needs of the project. Services provided for this project included: Retaining wall design, inspection and testing Subgrade material analysis and pavement design Observed site preparation prior of placement of fill Provided creative earthwork solutions for minimizing undercuts for poor quality soil conditions & temporary access roads Performed classification and testing of controlled fill materials Verified use of proper materials, densities, and lift thicknesses during placement of and compaction of fill Utility backfilling inspection and testing Foundation inspection Evaluated repairs during earthwork and culvert installations Assisted with proper installation of utilities in reinforced zone of retaining walls Inspection and proofrolling of subgrade and base course prior to paving Provide final NCDOT certification for road widening pavements
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