Cape Carteret Emergency Watershed Protection-Stormwater Wetland and Tidal Creek Restoration

Cape Carteret, North Carolina

LDSI was contracted by the North Carolina Coastal Federation to assist the Natural Resource Conservation Service, NC Department of Transportation, and other federal and state agencies with an Emergency Watershed Protection (EWP) project.  This project included the repair of a stormwater facility which was breached during Hurricane Florence. The wetland facility is upstream of Deer Creek which is a tidal creek, and SA-ORW waters. During the hurricane, the wetland berm was breached which led to sediment being transported downstream. The LDSI team worked with project partners during the initial scoping, Damage Survey Report (DSR), and preliminary meetings to secure funding and ensure that these State designated “outstanding resource waters” were protected and restored to pre-hurricane conditions within the applicable parameters of the EWP program policy. Additionally, as a project sponsor the NC Department of Transportation held an easement on the project. This meant that LDSI had to comply with the policy and program requirement of the Hydraulics Unit.

During the feasibility assessment, LDSI evaluated multiple concepts based on their ability to achieve water quantity and water quality goals. These concepts were evaluated with a multi-criteria decision matrix. The team utilized continuous simulation, steady state simulation, PondPack, and other hydrologic and hydraulic (H&H) models to size and evaluate the integrity of the infrastructure. Additionally, the team used water quality models to determine the reduction of sedimentation and ensure that the waters discharging to Deer Creek would not compromise the outstand resource waters. Within this EWP project the LDSI team provided:

  • Geotechnical evaluation of the remaining wetland berm
  • Existing conditions analysis (topography, H&H, sUAS (drone) photogrammetry)
  • Feasibility and programmatic compliance
  • Permitting
  • Final design

This project is currently in final review by the project stakeholdersDue to funding of NC DOT and the matching requirements of the EWP program this project is slated for construction in FY 2022. The engineering fee of this project was $33,160. 

Project Dates:

  • Dec. 2019-Present

Services Provided:

  • Disaster Response
  • Government Program Compliance
  • Watershed Analysis
  • Drainage System Design