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Nags Head unveils stormwater master plan update, estimates $3.9M in near‑term projects and $6.4M with phases
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Summary
Town staff and consultants presented an updated stormwater master plan including a new GIS dashboard, an inventory of ~1,320 culverts/storm mains, and conceptual designs for 17 project areas. Near‑term project costs total about $3.9 million with future phases adding ~$2.5 million.
Nags Head staff and engineering consultant McAdams presented an update to the town's stormwater master plan on April 15 that includes a comprehensive asset inventory, a new GIS dashboard for operations, and conceptual designs for 17 flooding hot spots across town.
David (town staff) said McAdams surveyed roughly 540 structures and more than 1,300 culverts and storm mains as part of an asset‑conditions assessment. "We surveyed approximately 540 structures... and compiled an updated database of stormwater assets across town," the consultant team told the board. The presentation included a live demonstration of a GIS dashboard that allows staff to filter assets by condition, view photos and priorities, and access the collected survey data in one place.
Consultant Cameron James identified project areas ranging from Carolinian Circle and West Bluejay Street to large, phased projects along Soundside Road and Memorial Avenue. Proposed measures include additional yard and curb inlets, HDPE perforated ("sock") pipe to increase infiltration and storage, upsizing undersized culverts, backflow prevention devices at outfalls, and—in later phases—infiltration basins and a pump station in the Soundside Road corridor.
Graham Sherrill of McAdams demonstrated the dashboard and said it will help staff prioritize repairs and CIP placement. The project prioritization will use likelihood and consequence of failure metrics derived from field condition assessments.
When asked about cost, staff said the package of current phases across the 17 areas is about $3.9 million; including anticipated future phases brings the total to approximately $6.4 million. "Broken up to all current phases, not accounting for future potential phases, the total is about $3,900,000," a consultant said. Staff said they will return in late summer with prioritized projects and an updated CIP recommendation and expect to finalize the master plan and watershed action plan in November to support grant applications.
The work is funded in part by a $400,000 planning grant from the state division of water infrastructure; staff said the watershed action plan will be structured to support Section 319 or other EPA grant applications for implementation.
Next steps include staff and consultant refinement of costs, public feedback, prioritization of the CIP list this summer, and a final report to the board in November.
