US Bridges

ST129 Richmond RD over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · .32 KM W of RTE 38 · Structure no. W380052KWDOTNBI

Built
1973
52 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
91 ft
1 main span
Daily traffic
29,500
2018 count
Owner
State
State Highway Agency

About this bridge

ST129 Richmond RD over RR Mbta/Bmrr is a steel stringer/multi-beam or girder carrying ST129 Richmond RD over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1973, so it is 52 years old, younger 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 29,500 vehicles a day, roughly 12% of them trucks, projected to reach 36,324 by 2033. The structure is 91 ft (27.7 m) long and 57 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST129 Richmond RD
CrossesRR Mbta/Bmrr
Location.32 KM W of RTE 38
RouteState Highway 129
CountyMiddlesex County
StateMassachusetts
Coordinates42.55691, -71.18569
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating55.1 US tons
Inventory rating31.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length91 ft (27.7 m)
Longest span86 ft (26.2 m)
Deck width57 ft (17.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,500 (2018)
Projected traffic36,324 by 2033
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 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$4.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST129 Richmond RD over RR Mbta/Bmrr built?

It was built in 1973, making it 52 years old in 2025.

What condition is ST129 Richmond RD 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 2024.

How much traffic does ST129 Richmond RD over RR Mbta/Bmrr carry?

About 29,500 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is ST129 Richmond RD over RR Mbta/Bmrr?

The structure is 91 ft (27.7 m) long with a longest span of 86 ft (26.2 m) and a deck 57 ft wide.

Who owns ST129 Richmond RD over RR Mbta/Bmrr?

It is owned by the State Highway Agency.