SCM Condition Assessments and Repair/Restoration Plans | NCDOT

Gradient is assessing, repairing, and restoring SCMs for NCDOT, including inspections, H&H modeling, and detailed rehabilitation planning.
This expertise aligns with Raleigh’s need for comprehensive stormwater infrastructure assessments and repair plans to maintain the effectiveness and resilience of its stormwater systems.

Overview

The NCDOT Roadside Environmental Unit (REU) conducts inspection and maintenance (I&M) for stormwater control measures (SCMs) operated by NCDOT throughout the state. Recent inspections have indicated that five SCMs within Divisions 9, 11, and 12 were not functioning as intended. Gradient, PLLC (Gradient) was selected to work with REU staff to assess these SCMs and develop repair plans to restore function.

The work has included SCM inspections to assess existing site conditions, topographic and location surveys, seasonally high water table (SHWT) assessments, and CCTV inspection of an existing outlet pipe for one of the SCMs. Gradient will also conduct hydrologic and hydraulic modeling and prepare conceptual designs for the proposed rehabilitation/repairs.

After receiving approval from NCDOT on the proposed conceptual design, Gradient will prepare detailed repair/restoration plans for each device, which will include drawings, details, project special provisions, and construction cost estimates.

Gradient Solution

After receiving approval from NCDOT on the proposed conceptual design, Gradient will prepare detailed repair/restoration plans for each device, which will include drawings, details, project special provisions, and construction cost estimates.

Gradient will provide limited construction support services for any of the sites if requested by NCDOT staff.

Services may include coordinating and assisting the division with the letting process, attending and assisting with pre-bid and preconstruction meetings, responding to contractors’ questions, reviewing construction practices and shop drawings, conducting construction site observations at key milestones, final walkthroughs with the contractor, as-built surveys, and preparing record drawings.