US Bridges

HWY Florence ST over HWY Dartmouth ST

Fair

Middlesex County, Massachusetts · 1.3 KM S. Melrose Line · Structure no. M0101638XMUNNBI

Built
1975
50 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
98 ft
1 main span
Daily traffic
11,600
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Florence ST over HWY Dartmouth ST is a steel stringer/multi-beam or girder carrying HWY Florence ST over HWY Dartmouth ST in Middlesex County, Massachusetts. It was built in 1975, so it is 50 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 6 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 11,600 vehicles a day, roughly 5% of them trucks, projected to reach 7,107 by 2031. The structure is 98 ft (29.9 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY Florence ST
CrossesHWY Dartmouth ST
Location1.3 KM S. Melrose Line
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.42874, -71.06869
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.3 US tons
Inventory rating38.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length98 ft (29.9 m)
Longest span92 ft (28 m)
Deck width77 ft (23.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,600 (2024)
Projected traffic7,107 by 2031
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Florence ST over HWY Dartmouth ST built?

It was built in 1975, making it 50 years old in 2025.

What condition is HWY Florence ST over HWY Dartmouth 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 HWY Florence ST over HWY Dartmouth ST carry?

About 11,600 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is HWY Florence ST over HWY Dartmouth ST?

The structure is 98 ft (29.9 m) long with a longest span of 92 ft (28 m) and a deck 77 ft wide.

Who owns HWY Florence ST over HWY Dartmouth ST?

It is owned by the City or Municipal Highway Agency.