US Bridges

HWY Dane ST over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · 3.2 KM N of Harvard Br. · Structure no. S170183GDDOT634

Built
1913
112 years old, rebuilt 1993
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
10,900
2019 count
Owner
State
State Highway Agency

About this bridge

HWY Dane ST over RR Mbta/Bmrr is a prestressed concrete box beam or girders - multiple carrying HWY Dane ST over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1913 and reconstructed in 1993, so it is 112 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 10,900 vehicles a day, roughly 10% of them trucks, projected to reach 15,319 by 2032. The structure is 76 ft (23.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Dane ST
CrossesRR Mbta/Bmrr
Location3.2 KM N of Harvard Br.
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.38094, -71.10432
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.4 US tons
Inventory rating53 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length76 ft (23.3 m)
Longest span73 ft (22.4 m)
Deck width43 ft (13 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,900 (2019)
Projected traffic15,319 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 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$3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Dane ST over RR Mbta/Bmrr built?

It was built in 1913, making it 112 years old in 2025. It was reconstructed in 1993.

What condition is HWY Dane 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 October 2023.

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

About 10,900 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is HWY Dane ST over RR Mbta/Bmrr?

The structure is 76 ft (23.3 m) long with a longest span of 73 ft (22.4 m) and a deck 43 ft wide.

Who owns HWY Dane ST over RR Mbta/Bmrr?

It is owned by the State Highway Agency.