Coastal Engineering Project

Lumber River, Cape Fear River, and Neuse River Basins

NCDOT Reliance Effort – Stream Gauges

NC Department of Transportation

May – September 2019

Project Budget: $150,000

Scenic Consulting Group was contracted by the North Carolina Department of Transportation (NCDOT) to assess and prioritize storm flooding locations on Interstate 40 and Interstate 95 highway corridors and install eight new stream gauges to provide water level data to predict roadway flooding and provide water level data for hydraulic modeling. The stream gauges were configured to report water level data to the North Carolina Emergency Management’s NC Contrails and Flood Inundation Mapping and Alert Network (FIMAN) systems which forecast flooding impacts and damages.  Scenic Consulting Group completed 37 gauge site assessments located in the Lumber River, Cape Fear River, and Neuse River Basins at crossings with NCDOT structures. The sites were identified as priorities as a result of major flooding impacts observed during Hurricanes Michael and Florence. The project developed a new standard drawing for stream gauge mounts which will serve as a standard mount design for all future NCDOT gauge installations. The new gauges were surveyed to provide location coordinates, low steel structural elevations, water level elevations, and water sensor elevation to allow the stream gauge to be coordinated with NC Contrails and FIMAN systems. The project surveyed critical elevations on highway locations which are subject to flooding and closure. These elevations allowed the new gauge data to be compared to low points on highways and provide potential road closure forecasts.