US Bridges

US 1 Sb/Broadway over ST 99 NB Conn

Fair

Essex County, Massachusetts · 1.5 MI N of JCT SR60&US1 · Structure no. S050373AQDOTNBI

Built
1975
50 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
44,900
2023 count
Owner
State
State Highway Agency

About this bridge

US 1 Sb/Broadway over ST 99 NB Conn is a steel stringer/multi-beam or girder carrying US 1 Sb/Broadway over ST 99 NB Conn in Essex County, Massachusetts. It was built in 1975, so it is 50 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 44,900 vehicles a day, roughly 12% of them trucks, projected to reach 69,489 by 2031. The structure is 81 ft (24.7 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesUS 1 Sb/Broadway
CrossesST 99 NB Conn
Location1.5 MI N of JCT SR60&US1
RouteU.S. Route 1
CountyEssex County
StateMassachusetts
Coordinates42.45127, -71.02357
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.3 US tons
Inventory rating35.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length81 ft (24.7 m)
Longest span78 ft (23.8 m)
Deck width45 ft (13.8 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,900 (2023)
Projected traffic69,489 by 2031
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 1 Sb/Broadway over ST 99 NB Conn built?

It was built in 1975, making it 50 years old in 2025.

What condition is US 1 Sb/Broadway over ST 99 NB Conn 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 October 2024.

How much traffic does US 1 Sb/Broadway over ST 99 NB Conn carry?

About 44,900 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 1 Sb/Broadway over ST 99 NB Conn?

The structure is 81 ft (24.7 m) long with a longest span of 78 ft (23.8 m) and a deck 45 ft wide.

Who owns US 1 Sb/Broadway over ST 99 NB Conn?

It is owned by the State Highway Agency.