Blackwater River (VA) at Dendron, VA
River level and flood forecast · Surry County
Normal31.8 ftas of Mon 3:45 PM
The river is 4.5 ft below flood stage (36.3 ft).
Flow: 0 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Flood stage | 36.3 ft |
| Action stage | 35.3 ft |
| Record crest (September 17, 1999) | 46.41 ft |
What floods at each level
From the National Weather Service, highest first.
- 44.3 ftThe Blackwater River overflows the bridge on White Marsh Road.
- 42.5 ftRiver stage sensor operating limit
- 42.3 ftWhite Marsh Road Bridge, over the Blackwater River, is completely flooded.
- 40.3 ftWhite Marsh Road (VA 617), including the west end of the bridge across the Blackwater River, begins to flood.
- 39.8 ftWater begins to cover Sexton Rd about 1/8 of a mile north of the river gauge.
- 39.3 ftWalls Bridge Road is impassible due to high water.
- 36.3 ftJones Town Drive and Walls Bridge Road begin to flood.
Highest crests on record
- 46.41 ft — September 17, 1999
- 42.4 ft — August 20, 1940
- 39.88 ft — June 9, 2013
- 39.87 ft — September 20, 2003
- 39.66 ft — September 9, 2011
Recent crests: 36.85 ft (July 19, 2025) · 37.26 ft (March 19, 2025) · 35.78 ft (February 17, 2025) · 36.31 ft (March 8, 2024) · 36.62 ft (February 20, 2021)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (DNDV2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.