US Bridges

RTE 1 over Byram River

Fair

Fairfield County, Connecticut · New York State Line · Structure no. 07024

Built
1888
137 years old
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
90 ft
2 main spans
Daily traffic
14,570
2009 count
Owner
State
State Highway Agency

About this bridge

RTE 1 over Byram River is a masonry arch - deck carrying RTE 1 over Byram River in Fairfield County, Connecticut. It was built in 1888, so it is 137 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 14,570 vehicles a day, roughly 4% of them trucks, projected to reach 21,650 by 2029. The structure is 90 ft (27.4 m) long and 48 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesRTE 1
CrossesByram River
LocationNew York State Line
RouteU.S. Route 1
CountyFairfield County
StateConnecticut
Coordinates41.01214, -73.65538
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
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 protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating84.7 US tons
Inventory rating21.6 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans2
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span33 ft (10 m)
Deck width48 ft (14.6 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,570 (2009)
Projected traffic21,650 by 2029
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$5.3 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 1 over Byram River built?

It was built in 1888, making it 137 years old in 2025.

What condition is RTE 1 over Byram 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 April 2024.

How much traffic does RTE 1 over Byram River carry?

About 14,570 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is RTE 1 over Byram River?

The structure is 90 ft (27.4 m) long with a longest span of 33 ft (10 m) and a deck 48 ft wide.

Who owns RTE 1 over Byram River?

It is owned by the State Highway Agency.