US Bridges

ST129 Lowell ST over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · 0.1 MI Ely Wilmington T.L · Structure no. R030022KUDOTNBI

Built
1958
67 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
120 ft
1 main span
Daily traffic
28,448
2017 count
Owner
State
State Highway Agency

About this bridge

ST129 Lowell ST over RR Mbta/Bmrr is a prestressed concrete stringer/multi-beam or girder carrying ST129 Lowell ST over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1958, so it is 67 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 28,448 vehicles a day, roughly 10% of them trucks, projected to reach 37,587 by 2032. The structure is 120 ft (36.6 m) long and 53 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST129 Lowell ST
CrossesRR Mbta/Bmrr
Location0.1 MI Ely Wilmington T.L
RouteState Highway 129
CountyMiddlesex County
StateMassachusetts
Coordinates42.53617, -71.13043
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionFebruary 2023
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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.8 US tons
Inventory rating31.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 20
Structure length120 ft (36.6 m)
Longest span55 ft (16.8 m)
Deck width53 ft (16.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,448 (2017)
Projected traffic37,587 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
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$5.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST129 Lowell ST over RR Mbta/Bmrr built?

It was built in 1958, making it 67 years old in 2025.

What condition is ST129 Lowell ST over RR Mbta/Bmrr 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 February 2023.

How much traffic does ST129 Lowell ST over RR Mbta/Bmrr carry?

About 28,448 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is ST129 Lowell ST over RR Mbta/Bmrr?

The structure is 120 ft (36.6 m) long with a longest span of 55 ft (16.8 m) and a deck 53 ft wide.

Who owns ST129 Lowell ST over RR Mbta/Bmrr?

It is owned by the State Highway Agency.