US Bridges

HWY Mountain Ave over Comb Mbta/Bmrr & Orange

Fair

Middlesex County, Massachusetts · Btwn Summer & Washington · Structure no. M010054UTMBTNBI

Built
1890
135 years old, rebuilt 1995
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
3,000
1997 count
Owner
State
Other State Agency

About this bridge

HWY Mountain Ave over Comb Mbta/Bmrr & Orange is a prestressed concrete box beam or girders - multiple carrying HWY Mountain Ave over Comb Mbta/Bmrr & Orange in Middlesex County, Massachusetts. It was built in 1890 and reconstructed in 1995, so it is 135 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 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 3,000 vehicles a day, roughly 4% of them trucks, projected to reach 4,738 by 2032. The structure is 94 ft (28.8 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHWY Mountain Ave
CrossesComb Mbta/Bmrr & Orange
LocationBtwn Summer & Washington
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.42987, -71.07307
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101.7 US tons
Inventory rating61 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length94 ft (28.8 m)
Longest span93 ft (28.2 m)
Deck width53 ft (16.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (1997)
Projected traffic4,738 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Mountain Ave over Comb Mbta/Bmrr & Orange built?

It was built in 1890, making it 135 years old in 2025. It was reconstructed in 1995.

What condition is HWY Mountain Ave over Comb Mbta/Bmrr & Orange 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 May 2023.

How much traffic does HWY Mountain Ave over Comb Mbta/Bmrr & Orange carry?

About 3,000 vehicles per day (1997 count), of which roughly 4% are trucks.

How long is HWY Mountain Ave over Comb Mbta/Bmrr & Orange?

The structure is 94 ft (28.8 m) long with a longest span of 93 ft (28.2 m) and a deck 53 ft wide.

Who owns HWY Mountain Ave over Comb Mbta/Bmrr & Orange?

It is owned by the Other State Agency.