Why the Saddle River floods: Lodi, Rochelle Park, Paramus, Ridgewood and Fair Lawn
The Saddle River is a small river with one of the longest flood records in Bergen County. The gauge at Lodi explains most of it: how often, how high, and how little warning there is.
The Saddle River drains about 55 square miles of heavily built-up land and reaches the Passaic just below Lodi. The National Weather Service counted 99 floods at its Lodi gauge between 1924 and 2018, and the five highest crests all stood more than four feet above what is now major flood stage. This guide sets out what the gauge, the US Geological Survey, FEMA and the county hazard plan record about where the water goes, how fast it rises, and what has and has not been built to stop it.
The short version
- The National Weather Service counted 99 floods at the Lodi gauge between 1924 and 2018, in every month of the year.
- Major flood stage at Lodi is 8.0 feet. The five highest crests range from 12.36 to 13.94 feet: Floyd in 1999, Irene in 2011, April 2007, Ida in 2021 and November 1977.
- During Ida the river at Lodi went from 2.5 feet in mid-afternoon to 11.9 feet before six the next morning.
- USGS classes about 81 per cent of the land beside the Rochelle Park to Lodi reach as urban or developed.
- The county plan lists 1,107 flood insurance losses in Lodi and 899 in Rochelle Park, far more than their share of mapped flood zone would suggest.
- The federal Lower Saddle River flood project was authorised in 1986 and has not been built; it returned to the study stage in 2026.
A small river with a long flood record
The US Geological Survey places the headwaters of the Saddle River in Rockland County, New York, from where it flows generally south into Bergen County. At the Lodi streamgage the drainage area is 54.6 square miles, and the river joins the Passaic 1.1 miles downstream from Lodi. That is a modest catchment, yet the gauge has one of the busier flood histories in the county. USGS has collected data at Lodi since October 1923. The National Weather Service flood climatology for the site, which covers 1924 onward, counts 99 floods measured against the six-foot flood stage then in use, with the most recent on that list in December 2018. Floods appear in every month of the year; March and April have the most. The Army Corps of Engineers, in its fact sheet for the lower river, lists significant flooding in May 1968, September 1971, August 1973, November 1977, May 1979, April 1984, September 1999 and April 2007, and adds the remnants of Ida in September 2021, January 2024 and July 2025. This is not a river that floods once in a generation. It is one that floods often, and badly every decade or so.
What the Lodi gauge shows
The National Weather Service currently sets action stage at Lodi at 5.0 feet, minor flood stage at 5.5 feet, moderate at 7.0 feet and major at 8.0 feet. Older NWS documents use 6.0 feet as flood stage, so figures quoted in older reports are not always on the same basis. Against those thresholds, the five highest crests on record are 13.94 feet on September 16, 1999 (Floyd), 13.50 feet on August 28, 2011 (Irene), 12.99 feet on April 16, 2007, 12.57 feet on September 2, 2021 (Ida) and 12.36 feet on November 9, 1977. Every one of them is more than four feet above major flood stage. The NWS also publishes what each level means on the ground. At 5.5 feet the river reaches the back parking lot of the Boys and Girls Club in Lodi. At 6.5 feet flooding begins in the parking lot of the Rochelle Park municipal building. At 8.5 feet it reaches Washington Elementary School, and at 9 feet senior housing and Route 46. At 10.5 feet there is flooding along Sprout Brook. At 11 feet Main Street in Lodi is closed between Church Street and Union Street, and at 12 feet Passaic Street is impassable.
How fast it rises
The feature of this river that matters most to anyone living beside it is speed. The flood warnings the National Weather Service issued during Ida give a timed example. At 3:30 on the afternoon of Wednesday, September 1, 2021, the stage at Lodi was 2.5 feet, well below action stage. At 5:45 the next morning it was 11.9 feet, on its way to a 12.57-foot crest. That is a rise of more than nine feet overnight, most of it while people were asleep. The same pattern shows in the dates of other floods. During Irene the Saddle River at Lodi crested on August 28, 2011, the day the storm passed. The Passaic at Little Falls and at Dundee Dam did not crest until August 30. The Army Corps makes the general point in its Passaic basin report: the streams of the lower valley peak much earlier than the main river. For a homeowner the practical meaning is that the Saddle River gives hours of warning, not days, and that the time to move a car or lift things off a basement floor is when the flood watch is issued rather than when the water is visible.
What the river runs through
USGS mapped flood inundation along the reach from Rochelle Park to Lodi and described the setting plainly. Floodplains within Lodi are highly developed, with a mix of residential and commercial structures. About 81.2 per cent of the land beside that reach is classed as urban or developed, and six major road crossings or other structures sit in the main channel or the adjacent floodplain. Stink Creek joins the main stem as it passes through Lodi. FEMA records that the river has been reshaped more than once: dredging and straightening of the Saddle River in Paramus began in the late 1960s and major portions are now channelised, and local channel improvements were made in Lodi in 1954. The county hazard plan names Lodi, Ridgewood and Fair Lawn among the urban centres that often experience flash flooding. None of these sources puts a single cause on the flooding, and this guide does not either. What they describe together is a small river running through land that is almost entirely built on.
Upstream: Ridgewood, Paramus and Fair Lawn
There is a second gauge upstream at Ridgewood, where the drainage area is 21.6 square miles. The NWS sets minor flood stage there at 5 feet, moderate at 6 and major at 7, and lists a crest of 11.42 feet on August 28, 2011. FEMA calls that Irene flood, at 6,770 cubic feet per second, the second highest since the gauge was installed in 1936, behind 6,800 in July 1945. At 7 feet the NWS notes East Saddle River Road closed between East Glen Avenue and Bingham Road. Ho-Ho-Kus Brook joins the river in Ridgewood, and the county plan records Glen Avenue closed by flooding near the Ho-Ho-Kus Brook bridge. The county plan also gives the share of each municipality inside the FEMA one per cent annual chance flood zone: Rochelle Park 31.99 per cent, Saddle Brook 19.73, Paramus 11.64, Ridgewood 10.77, Fair Lawn 9.17 and Lodi 7.86. Those are whole-town figures from every flood source. They are also a reminder that a small percentage can hide a concentrated problem: the same plan lists 1,107 flood insurance losses in Lodi and 899 in Rochelle Park, against 435 in Ridgewood, 362 in Fair Lawn and 194 in Paramus.
The flood project that has not been built
Congress authorised the Lower Saddle River Flood Protection Project in the Water Resources Development Act of 1986. According to the Army Corps of Engineers, it covers the Saddle River and Sprout Brook in Garfield, Wallington, South Hackensack, Lodi, Saddle Brook, Rochelle Park, Paramus and Fair Lawn. Four decades on, it has not been constructed. The Corps fact sheet states that in 2022 its New York District recommended more in-depth analysis of the authorised project because conditions had changed, and that in 2026 federal funds were received for a Federal Interest Determination, which is described as ongoing. In other words the project is back at the study stage. Locally, the county plan records that Rochelle Park intends to install a system to monitor Saddle River levels in real time, and that Lodi will be working with the Army Corps. FEMA also notes that Rochelle Park, Saddle River Borough and Ridgewood have bought land inside flood hazard areas for recreational use.
What this means if you own property here
Three things follow from the record. First, watch the gauge, not the sky. The NWS forecast page for the Saddle River at Lodi shows the current stage and the predicted crest, and the stage-by-stage impact list above tells you what a given number means. Second, plan for speed. A river that can climb nine feet overnight leaves no time to improvise, so the useful preparation is done in advance: nothing valuable stored on a basement floor, and a clear idea of where the car goes. Never walk or drive into moving water, and treat any standing water indoors as an electrical hazard until the power is confirmed off. Third, check the flood map and your policy before you need either. Flood is a separate policy from homeowners insurance, and FEMA states that a new policy normally takes effect 30 days after purchase, so it cannot be arranged once a storm is in the forecast. Whether a particular address is in a mapped flood zone is a question for the FEMA Flood Map Service Center, not for a town-wide percentage.
Common questions
Why does the Saddle River flood so quickly?
The records describe a small catchment of about 55 square miles in which roughly four fifths of the land beside the lower river is developed, with six major road crossings or other structures in the channel or floodplain. None of the sources names a single cause. What the gauge shows is the result: during Ida the National Weather Service recorded the Lodi gauge at 2.5 feet in the afternoon and 11.9 feet early the next morning, a rise of more than nine feet overnight.
What is flood stage on the Saddle River at Lodi?
The National Weather Service currently uses 5.0 feet as action stage, 5.5 feet as minor flood stage, 7.0 feet as moderate and 8.0 feet as major. Older NWS documents use 6.0 feet as flood stage, so check which basis a report is using. The record crest is 13.94 feet, set on September 16, 1999.
Is anything being done to stop the flooding?
A federal flood protection project for the lower Saddle River and Sprout Brook was authorised by Congress in 1986 but has not been built. The Army Corps of Engineers reports that it recommended fresh analysis in 2022 and received federal funds in 2026 for a Federal Interest Determination, which is ongoing. Rochelle Park plans real-time river level monitoring.
Which towns does the Saddle River flood?
The Army Corps of Engineers names Garfield, Wallington, South Hackensack, Lodi, Saddle Brook, Rochelle Park, Paramus and Fair Lawn along the lower river and Sprout Brook. Upstream, the National Weather Service lists flood impacts in Ridgewood, including East Saddle River Road and Saddle River County Park.
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