US Bridges

Bristol Street #1 over Naugatuck River

Fair

New Haven County, Connecticut · Off Platts Mill Road · Structure no. 03724

Built
1956
69 years old, rebuilt 1990
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
3 main spans
Daily traffic
1,800
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bristol Street #1 over Naugatuck River is a steel stringer/multi-beam or girder carrying Bristol Street #1 over Naugatuck River in New Haven County, Connecticut. It was built in 1956 and reconstructed in 1990, so it is 69 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,800 vehicles a day, roughly 5% of them trucks, projected to reach 2,675 by 2043. The structure is 182 ft (55.5 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBristol Street #1
CrossesNaugatuck River
LocationOff Platts Mill Road
RouteCity Street 0
Coordinates41.51839, -73.05329
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length182 ft (55.5 m)
Longest span59 ft (18.1 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic2,675 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bristol Street #1 over Naugatuck River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1990.

What condition is Bristol Street #1 over Naugatuck River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2024.

How much traffic does Bristol Street #1 over Naugatuck River carry?

About 1,800 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Bristol Street #1 over Naugatuck River?

The structure is 182 ft (55.5 m) long with a longest span of 59 ft (18.1 m) and a deck 40 ft wide.

Who owns Bristol Street #1 over Naugatuck River?

It is owned by the City or Municipal Highway Agency.