US Bridges

HWY Mountain Ave over US 1 NE Xway

Fair

Suffolk County, Massachusetts · 1.76 KM N of JCT SR16 · Structure no. R050303ETDOTNBI

Built
1957
68 years old, rebuilt 1992
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
128 ft
2 main spans
Daily traffic
5,400
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Mountain Ave over US 1 NE Xway is a steel stringer/multi-beam or girder carrying HWY Mountain Ave over US 1 NE Xway in Suffolk County, Massachusetts. It was built in 1957 and reconstructed in 1992, so it is 68 years old, older 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 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 5,400 vehicles a day, roughly 4% of them trucks, projected to reach 6,475 by 2031. The structure is 128 ft (38.9 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Mountain Ave
CrossesUS 1 NE Xway
Location1.76 KM N of JCT SR16
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.41723, -71.03106
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.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length128 ft (38.9 m)
Longest span62 ft (18.9 m)
Deck width50 ft (15.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2024)
Projected traffic6,475 by 2031
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$5.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Mountain Ave over US 1 NE Xway built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1992.

What condition is HWY Mountain Ave over US 1 NE Xway 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 September 2024.

How much traffic does HWY Mountain Ave over US 1 NE Xway carry?

About 5,400 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Mountain Ave over US 1 NE Xway?

The structure is 128 ft (38.9 m) long with a longest span of 62 ft (18.9 m) and a deck 50 ft wide.

Who owns HWY Mountain Ave over US 1 NE Xway?

It is owned by the State Highway Agency.