An industrial valley remade by mills and floods

Built and rebuilt on a river that kept taking it back

You are standing in a valley bottom that manufacturers and floods have argued over for two centuries.
Last reviewed 12 September 2026 · A three-minute read · 1800–2025
The short answer

Naugatuck sits in a Connecticut valley bottom carved into 500-million-year-old Waterbury Gneiss, where mill factories and worker housing were packed onto the only flat ground beside the Naugatuck River. On August 19, 1955, hurricanes Connie and Diane sent that river 27 feet above its channel, killing eight people and destroying much of the downtown built there by Charles Goodyear's rubber industry.

Built and rebuilt on a river that kept taking it back — Naugatuck
Treehopper on sunflower leaf — 2021 · Jerryol · CC BY-SA 4.0
1900s to 1950s

A mill town built on the only flat ground

The ground under Naugatuck is old rock. The bedrock here is Waterbury Gneiss. It is a dark, banded stone. It formed more than 500 million years ago. It was squeezed and folded long before any river cut this valley into it. That valley floor is why the town exists where it does, and why it kept flooding.

Naugatuck grew up as a mill town. Its factories and worker housing were packed onto the narrow bottomland beside the river. That was the only ground flat enough to build on. The same flatness that made the valley good for factories made it good for water. When the Naugatuck River rose, it had nowhere to go but through the streets and shop floors that lined it.

By the middle of the 20th century, the damage had happened often enough. The state stopped treating it as bad luck. It started treating it as a planning problem. A Flood Insurance Study was compiled for the town. It laid out where the water had reached before and where it would reach again. Regional planners also published a study. It was called The Naugatuck Valley region: a regional planning study of conditions and prospects, 1955-1957. They prepared it for the Connecticut Development Commission. They tried to work out what the whole valley's mill economy would need to survive its own river.

The same flat ground that built the factories was the ground the river kept reclaiming.
August 19, 1955

The river rose 27 feet and took the town apart

The question got answered on one Friday in August. Back-to-back hurricanes, Connie and then Diane, dumped rain across the valley. The Naugatuck River rose 27 feet above its normal channel. It came through downtown Naugatuck the way it always had, but harder. Eight people died in the borough. Eighty-seven died across Connecticut. Homes were carried off their foundations. Entire blocks of the town center were destroyed in hours. People who lived through it called it Black Friday. The name stuck because there was nothing else to call a day the river took the town apart.

The river rose 27 feet and took the town center with it.
1800s to mid-1900s

Vulcanized rubber built the wealth that got rebuilt

The reason there was a town center to lose was rubber. Charles Goodyear discovered vulcanized rubber. Years of failed experiments led to his breakthrough. Naugatuck's riverside factories made a product the whole country wanted. Boots, hoses, tires and belting came out of plants stacked along Water Street. The lowland was flat and next to a river. The river could power machinery. It could carry away waste. This is why the factories chose it. Later in the 20th century those factories turned out Naugahyde. This is a synthetic leather. It took the town's name into furniture stores and diners across the country. The valley floor that flooded also built the wealth that got rebuilt each time.

1845 to mid-1900s

Factories and sewage poured into the same river

Downstream, that same river carried more than floodwater. For a century, brass mills, rubber plants and the town's sewage went straight into the Naugatuck River. Metalworking shops upstream dumped their waste too. The water that periodically rose into people's kitchens and shop floors was also the water hauling away everything the factories didn't want. Nobody upstream or down treated it as one problem. It was two separate uses of the same river. One was industrial. One was destructive. Both ran through the same channel at the same time.

time immemorial to contact

Algonquian nations held this valley before the mills

Before any of that, this valley belonged to people the mills displaced. The Paugussett Nation held this ground. So did the Schaghticoke, Tunxis, Wappinger, Quinnipiac and Mohican nations. All were Algonquian-speaking peoples. Their territory ran through the Naugatuck Valley. The town's own name comes from their language. It named a river before it named a rubber company or a flood zone. What the mills and the water fought over for two centuries had already been someone's home for much longer than that.

The river still runs past the old mill ground, low and ordinary, until the next time it isn't.

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Where this is

41.493°N 73.032°W TILE ≈ 1.2 × 0.6 KM
Place
Naugatuck
Town
Naugatuck
Country
United States
Tile
≈1.2 × 0.6 km (geohash6)
Last reviewed
12 September 2026

The layers, in order

Sourced records, high and medium confidence. Era background is marked as such.
Modern
A car hit a guardrail near this intersection after occupants reported being shot at, and a 19-year-old was later arrested in connection with the shooting.
NBC Connecticut · record, medium
Two vehicles collided near Fulling Mills Deli around 9:45 p.m. one Thursday night, one car catching fire and both drivers taken to the hospital, closing Prospect Street for two hours.
NBC Connecticut · record, medium
A fire alarm at Weid Drive's senior housing led firefighters to smoke coming from a Building 8 apartment; the resident escaped with a neighbor's help, one person injured.
Ground News · record, medium
Seven people were hospitalized after carbon monoxide exposure on the 100 block of Allerton Road one Saturday night near midnight.
NBC Connecticut · record, medium
1800s to mid-20th century
After Charles Goodyear's vulcanized rubber breakthrough, Naugatuck grew into a center of rubber manufacturing and later gave the world Naugahyde synthetic leather.
1845 to mid-1900s
Brass mill waste, metalworking byproducts, rubber chemicals, and sewage poured into the Naugatuck River from 1845 through the mid-1900s.
Naugatuck River Watershed · record, medium
August 19, 1955
On August 19, 1955, back-to-back hurricanes Connie and Diane sent the Naugatuck River surging 27 feet, killing eight people in town and destroying much of the downtown.
January 21, 2025
An 86-year-old woman died from burns after a fire broke out at the Oak Terrace apartment complex on Conrad Street around 2:40 a.m. on January 21, 2025.
Yahoo News · record, high

Questions about this place

Answered in one sentence, then in full above
What happened at Naugatuck during the 1955 flood?
On August 19, 1955, back-to-back hurricanes Connie and Diane sent the Naugatuck River 27 feet above its normal channel, destroying much of the downtown and killing eight people in the borough, part of eighty-seven deaths across Connecticut that day known locally as Black Friday.
What was here before Naugatuck's factories were built?
The valley floor was Algonquian-speaking territory held by the Paugussett, Schaghticoke, Tunxis, Wappinger, Quinnipiac and Mohican nations, and the town's own name comes from their language for the river, long before any factory or flood zone existed there.
Why did Naugatuck keep flooding?
Its factories and worker housing were built on the narrow, flat bottomland beside the Naugatuck River because that was the only ground level enough for construction, and that same flatness gave the river nowhere else to go when it rose.
What industry made Naugatuck famous?
Charles Goodyear's discovery of vulcanized rubber turned Naugatuck into a manufacturing center for boots, hoses, tires and belting, and later the town's factories produced Naugahyde synthetic leather, which carried the town's name into furniture stores and diners nationwide.
What was dumped into the Naugatuck River?
From 1845 through the mid-1900s, brass mills, rubber plants, metalworking shops and the town's sewage poured waste directly into the Naugatuck River, the same channel that periodically rose into homes and shop floors.
What kind of rock is Naugatuck built on?
The bedrock beneath Naugatuck is Waterbury Gneiss, a dark, banded stone formed more than 500 million years ago and folded long before the river cut the valley into it.

Where this came from

1
Naugatuck Historical Society — The night the Naugatuck River rose 27 feet
2
Yahoo News — Fatal apartment fire at Oak Terrace
3
NBC Connecticut — Shooting and crash at Route 63 and Mill Street
4
Ground News — Fire at George B. Lewis senior housing
5
Connecticut History/CT Humanities — Naugatuck's rubber empire and the birth of Naugahyde
6
Naugatuck River Watershed — A century of industrial waste in the river

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