Rivers in New Jersey
Raritan River at Manville
Below flood stage
4.45ftStage
Observed Wed, Sep 23, 6:15 AM EDT
- Flood stage
- 14.00 ft
- Forecast crest
- 4.10 ftWed, Sep 23, 8:00 AM EDT
- Record crest
- 27.66 ft2021
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 20.00 ft |
| Moderate flood | 17.00 ft |
| Minor flood | 14.00 ft |
| Action | 12.00 ft |
- 20.00 ftFlooding becomes widespread across Manville. Flooding expands between Dukes Parkway and Brooks Blvd. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone.
- 19.00 ftSouth Bridge Street in Somerville is closed. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone. Old York Road and Robert Street floods. Old York Road and Park Drive floods.
- 18.00 ftEast Dukes Parkway and several bridges in Manville are flooded. Roads throughout the area are closed due to high water. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone.
- 17.00 ftStreet and roadway flooding increases across the Manville area. The Van Veghten Bridge and Main Street in Manville are flooded as well as 5th Street in Somerville. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone.
- 16.00 ftLincoln Avenue in the Lost Valley section of Manville floods.
- 15.00 ftDukes Parkway begins to flood in Hillsborough.
- 13.00 ftSouthside Avenue in Somerville floods.
- 12.00 ftCautionary/Action stage is reached. Roads and trails flood within Dukes Park.
- 11.00 ftAt this level, inundation begins in Dukes Park in Manville.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 12% |
| Moderate flooding | 6% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.
Crest history
48 crests on NOAA’s list since 1938.
| # | Date | Stage |
|---|---|---|
| 1 | September 2, 2021 | 27.66 ft |
| 2 | September 17, 1999 | 27.10 ft |
| 3 | August 28, 2011 | 26.24 ft |
| 4 | August 28, 1971 | 23.80 ft |
| 5 | October 20, 1996 | 22.41 ft |
| 6 | April 16, 2007 | 22.30 ft |
| 7 | August 19, 1955 | 21.80 ft |
| 8 | March 14, 2010 | 21.57 ft |
| 9 | September 22, 1938 | 20.42 ft |
| 10 | January 10, 2024 | 20.04 ft |
| 11 | May 1, 2014 | 19.99 ft |
| 12 | July 7, 1984 | 19.95 ft |
| 13 | August 13, 1955 | 19.90 ft |
| 14 | December 19, 2023 | 19.84 ft |
| 15 | January 20, 1996 | 19.82 ft |
| 16 | October 15, 1955 | 19.60 ft |
| 17 | September 8, 2011 | 19.18 ft |
| 18 | April 16, 1983 | 18.39 ft |
| 19 | June 23, 1972 | 17.89 ft |
| 20 | April 5, 1984 | 17.50 ft |
| 21 | April 17, 2011 | 17.30 ft |
| 22 | April 3, 2005 | 16.96 ft |
| 23 | May 30, 1984 | 16.78 ft |
| 24 | August 24, 2021 | 16.61 ft |
| 25 | December 11, 2003 | 16.60 ft |
Most recent crests
- January 10, 2024: 20.04 ft
- December 28, 2023: 16.45 ft
- December 19, 2023: 19.84 ft
- April 8, 2022: 15.99 ft
- September 2, 2021: 27.66 ft
- August 24, 2021: 16.61 ft
- July 18, 2021: 14.00 ft
- December 25, 2020: 14.68 ft
- December 1, 2020: 14.02 ft
- November 25, 2018: 16.12 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.
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.