Flood Impact Dashboard · Bat Cave, NC

Event Quick Stats

6–10″

Rainfall

14.2′

Peak Stage

~12′

Above Normal

48″

Culvert Failure

US-74A

Hwy Closed

Multiple

Swiftwater Rescues

Watershed Profile

Drainage area	94.4 sq mi
HUC-8 basin	03060102
Gorge length	~14 miles
Elevation drop	~1,800 ft
Bedrock	Henderson Augen Gneiss
Record peak (1928)	26,000 cfs
Helene rainfall (3-day)	19.99 in.
Helene landslides (region)	2,217

BCVN7 Stage Thresholds
Action: 6.0 ft | Minor: 7.5 ft
Moderate: 8.5 ft | Major: 9.5 ft
May 2026 peak: 14.2 ft (+4.7 ft above Major)

Map Layers

May 2026 Simulated Flood Extent

100-Year Floodplain (FEMA)

500-Year Floodplain (FEMA)

US-74A Highway Corridor

Critical POI Markers

Watershed Boundary (94.4 sq mi)

Landslide Hazard Zones (NCGS)

Hydrology: USGS NWIS gauge 02148500 · NWS BCVN7 · USGS StreamStats NC

Geomorphology: Scheip et al. 2026 (ESPaL) · Schaefer et al. 2025 (GSA Today) · Allstadt et al. 2025 (USGS OFR 2025-1028)

Landslide hazard: Wooten et al. 2011 (NCGS DDS-GHMS-5) · Wooten et al. 2016 (Springer)

Climate: Davis 2024 (NC State Climate Office) · NHC TCR AL092024

Flood mapping: NC FRIS · NC OneMap · FEMA MSC

Ecology: NC DEQ 2024 Broad River Basin Plan · TNC NC 2025

⚠ Flood extents and landslide zones are schematic — for visualization and planning context only. Refer to official FEMA DFIRMs (msc.fema.gov) and NCGS hazard maps (deq.nc.gov/ncgs) for regulatory and engineering use.

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3D Terrain active · Exaggeration: 1.5×