US Bridges

ST 28 Mcgrath HWY over RR Mbta/Bmrr

Poor

Middlesex County, Massachusetts · .1 MI S of Pearl ST · Structure no. S170224E2DOTNBI

Built
1926
99 years old, rebuilt 1983
Condition
Poor
inspected January 2023
Type
Truss - Thru
Steel
Length
174 ft
1 main span
Daily traffic
32,000
2023 count
Owner
State
State Highway Agency

About this bridge

ST 28 Mcgrath HWY over RR Mbta/Bmrr is a steel truss - thru carrying ST 28 Mcgrath HWY over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1926 and reconstructed in 1983, so it is 99 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 32,000 vehicles a day, roughly 2% of them trucks, projected to reach 59,540 by 2031. The structure is 174 ft (53 m) long and 108 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesST 28 Mcgrath HWY
CrossesRR Mbta/Bmrr
Location.1 MI S of Pearl ST
RouteState Highway 28
Coordinates42.38438, -71.09139
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 12 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating11.9 US tons
Inventory rating7.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length174 ft (53 m)
Longest span172 ft (52.3 m)
Deck width108 ft (32.9 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic32,000 (2023)
Projected traffic59,540 by 2031
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$40.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 28 Mcgrath HWY over RR Mbta/Bmrr built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1983.

What condition is ST 28 Mcgrath HWY over RR Mbta/Bmrr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2023.

How much traffic does ST 28 Mcgrath HWY over RR Mbta/Bmrr carry?

About 32,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is ST 28 Mcgrath HWY over RR Mbta/Bmrr?

The structure is 174 ft (53 m) long with a longest span of 172 ft (52.3 m) and a deck 108 ft wide.

Who owns ST 28 Mcgrath HWY over RR Mbta/Bmrr?

It is owned by the State Highway Agency.