US Bridges

ST 28 Sb/Mcgrath over HWY Medford ST

Fair

Middlesex County, Massachusetts · .1 MI W of Allston ST · Structure no. S170394E6DOTNBI

Built
1951
74 years old, rebuilt 2015
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
774 ft
13 main spans
Daily traffic
18,135
2020 count
Owner
State
State Highway Agency

About this bridge

ST 28 Sb/Mcgrath over HWY Medford ST is a steel stringer/multi-beam or girder carrying ST 28 Sb/Mcgrath over HWY Medford ST in Middlesex County, Massachusetts. It was built in 1951 and reconstructed in 2015, so it is 74 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 18,135 vehicles a day, roughly 10% of them trucks, projected to reach 25,269 by 2033. The structure is 774 ft (235.9 m) long and 34 ft wide.

CarriesST 28 Sb/Mcgrath
CrossesHWY Medford ST
Location.1 MI W of Allston ST
RouteState Highway 28
Coordinates42.37738, -71.08879
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
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 rating66.1 US tons
Inventory rating39.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans13 (+1 approach)
Design loadHS 20
Structure length774 ft (235.9 m)
Longest span90 ft (27.5 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,135 (2020)
Projected traffic25,269 by 2033
Trucks10%
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$23.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 28 Sb/Mcgrath over HWY Medford ST built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2015.

What condition is ST 28 Sb/Mcgrath over HWY Medford ST 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 2024.

How much traffic does ST 28 Sb/Mcgrath over HWY Medford ST carry?

About 18,135 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is ST 28 Sb/Mcgrath over HWY Medford ST?

The structure is 774 ft (235.9 m) long with a longest span of 90 ft (27.5 m) and a deck 34 ft wide.

Who owns ST 28 Sb/Mcgrath over HWY Medford ST?

It is owned by the State Highway Agency.