Rivers in Maryland

Seneca Creek at Dawsonville

Montgomery County, MarylandNWS DAWM2USGS 01645000Sterling office

Below flood stage
2.05ftStage

Observed Sun, Sep 27, 8:50 PM EDT

Flood stage
7.50 ft
Forecast crest
2.10 ftMon, Sep 28, 2:00 AM EDT
Record crest
16.40 ft1972

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood16.00 ft
Moderate flood11.00 ft
Minor flood7.50 ft
Action5.00 ft
  1. 34.00 ftWater covers the Route 28 bridge near Dawsonville.
  2. 21.00 ftWater reaches the parking lot off Route 28 for Seneca Creek State Park.
  3. 16.00 ftNumerous roads are flooded near Seneca Creek. The exact roads affected will depend on which portion of the basin received the heaviest rainfall.
  4. 14.00 ftWater reaches the instrumentation inside the gage house. Automated reports from this location will likely be unavailable above this level.
  5. 11.00 ftWater from the creek enters the gage house. Reports from this location may become sporadic. Multiple roads are flooded, and water is also reaching the first floor of Old Black Rock Mill.
  6. 7.50 ftPortions of the Seneca Creek Greenway are flooded. A small portion of Berryville Road west of Darnestown begins to flood.
  7. 5.00 ftWater begins to overflow the banks underneath the route 28 bridge. Users of the seneca creek greenway should seek higher ground at these levels.

Flood outlook

Chance of flooding, September to November

CategoryChance
Minor flooding25%
Moderate flooding6%
Major floodingUnder 5%

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.

Crest history

148 crests on NOAA’s list since 1933.

#DateStage
1June 22, 197216.40 ft
2September 12, 197116.32 ft
3September 9, 201115.78 ft
4September 6, 197912.69 ft
5September 26, 197512.67 ft
6July 21, 195612.17 ft
7July 8, 201911.73 ft
8January 31, 201311.35 ft
9October 30, 201211.13 ft
10June 18, 199611.01 ft
11October 1, 197910.95 ft
12May 16, 201410.94 ft
13July 22, 201810.82 ft
14January 31, 201310.80 ft
15May 1, 201410.61 ft
16September 23, 200310.52 ft
17January 19, 199610.41 ft
18December 11, 200310.40 ft
19November 28, 199310.37 ft
20August 24, 193310.30 ft
21June 26, 200610.29 ft
22May 6, 198910.09 ft
23November 17, 20069.99 ft
24January 26, 19789.96 ft
25June 28, 20159.92 ft

Most recent crests

  • January 10, 2024: 7.90 ft
  • December 18, 2023: 7.72 ft
  • September 23, 2021: 7.68 ft
  • November 1, 2019: 9.00 ft
  • July 8, 2019: 11.73 ft
  • March 22, 2019: 8.73 ft
  • December 16, 2018: 8.98 ft
  • November 25, 2018: 8.18 ft
  • September 28, 2018: 8.26 ft
  • July 22, 2018: 10.82 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

Forecasts by the Middle Atlantic River Forecast Center. Forecasts are issued routinely year-round. Stage may be affected by ice.

Sources

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.