Currituck County hearing: 2025 beach monitoring shows mixed short‑term gains but long‑term erosion; Ocean Hills flagged as most vulnerable

Ken Wilson, a representative of Coastal Protection Engineering, presented the results of Currituck County’s 2025 beach monitoring and an update on a draft beach management plan, telling county leaders the data show short‑term variability but a longer‑term erosional trend that leaves some oceanfront neighborhoods more exposed.

“Since 2009 to 2025, we’ve been tracking about a 3.9 foot‑per‑year loss of the shoreline over that long term,” Wilson said, summarizing the study’s long‑term projection and noting that short‑term surveys can show large year‑to‑year swings.

The monitoring program, begun in 2020, combines shoreline‑position metrics (the county uses the +4‑ft contour as a shoreline proxy) with volumetric profiles out to an offshore “closure depth” (about ‑19 feet) to measure how much sand the nearshore system gains or loses. Wilson said the county initially surveyed the full 22.5 miles of oceanfront annually, moved to an every‑other‑year full survey in 2023 and this year focused updated surveys south of the Horse Gate (Corolla).

Wilson reported that the long‑term shoreline rates imply substantial retreat at some transects (he cited about 62 feet of shoreline change at one profile going back to 2009), but that shorter windows can show opposite signals: the 2020–2023 window recorded positive volume trends while June 2024–June 2025 showed negative rates in parts of Corolla (about ‑6.5 cubic yards per foot per year for that 12‑month period). Across the broader 2020–2025 period he reported net positive cubic‑yard totals for some sections (the Corolla section showed roughly +1.4 cy/ft/yr averaged over 2020–2025), but cautioned that two recent years of decline amount to several hundred thousand cubic yards of loss in the shorter window.

Wilson said the project uses multiple lines of evidence—long‑term lidar and survey records, the county’s 120 transect stations, and storm simulations run with Delft3D and XBeach—to identify vulnerabilities. He said the team has prioritized three areas for attention: Ocean Hills (which the analysis shows has the highest concentration of oceanfront structures projected to be impacted over a 30‑year horizon), Whalehead Beach (intermittent vulnerability), and Spindrift (a short segment where a 2023 truck‑haul placed sand and temporarily altered trends).

To evaluate storm impacts, the team calibrated models on historical events (including Hurricane Isabel and a 2009 nor’easter), adjusting water levels to current conditions. That work produces an “impact line” on profiles—the landward location where elevation falls by one foot in the simulation—that the consultants combine spatially to identify structures likely to be affected by a given storm scenario.

The draft beach management plan will translate those technical results into policy options and triggers. Wilson said the plan’s stated county goals include preserving tourism‑related tax revenue and maintenance of recreational beaches, reducing dune breach and storm risk to oceanfront properties and public roads, and managing long‑term erosion risks. Concepts under consideration include relocation/retreat of the most vulnerable structures, small‑scale truck‑haul projects, larger offshore dredge nourishment for multi‑mile stretches, limited use of coastal structures where state policy permits, and non‑structural measures such as sand fencing and dune vegetation.

On policy limits, Wilson noted North Carolina law generally prohibits hardened shoreline stabilization devices and said exceptions (for example some terminal groins) require specific legal or permitting routes; he referenced the Coastal Resources Commission and state permitting as the controlling authorities. A participant at the meeting urged the state legislature to provide more coastal funding.

Wilson reviewed sand resources and permitting status: an earlier reconnaissance (2014) identified a large shoal with roughly 15 million cubic yards of sand, and more recent investigations expanded and added borrow‑area polygons (some areas now estimated or permitted in the low‑ to mid‑millions of cubic yards range). He said permit applications for certain borrow areas will be filed near the end of the coming month and cautioned that mobilization and permitting typically mean offshore nourishment projects need two or more years to reach construction; he gave an example mobilization estimate of about $9.5 million being shared across a 12‑mile program in a nearby county.

On short‑term mitigation, Wilson described truck‑haul hotspot projects and owner‑led measures (sandbags, emergency truck hauls) as possible, lower‑scale responses but warned they are typically short‑lived and can be expensive on a per‑property basis (he cited a 2023 Spindrift truck‑haul that cost about $450,000 across eight properties). He said the team will use the calibrated XBeach breaching analysis, the hazard matrix (storm vulnerability, 30‑year projections, recent erosion rates, and usable beach width), and community feedback to refine priorities and cost estimates.

Next steps: Wilson said the team expects to complete the breaching analysis soon, finalize the draft management plan in the coming months, and return with cost options and trigger recommendations for board feedback. The session moved to a break after additional public questions and comments.

The presentation referenced state grants used to support modeling work (Wilson said the team received roughly $130,000 from the state’s coastal storm damage mitigation fund for additional XBeach modeling), and repeatedly highlighted uncertainty: Wilson urged the county to use long‑term rates for planning while preparing short‑term options for the most exposed properties.