US Bridges

HWY Prentiss ST over Comb Amtrak/Mbta & Orng

Fair

Suffolk County, Massachusetts · 1st Br S of Ruggles ST · Structure no. B160894V9MBTNBI

Built
1981
44 years old
Condition
Fair
inspected September 2022
Type
Frame
Concrete Continuous
Length
81 ft
2 main spans
Daily traffic
5,450
2022 count
Owner
State
Other State Agency

About this bridge

HWY Prentiss ST over Comb Amtrak/Mbta & Orng is a concrete continuous frame carrying HWY Prentiss ST over Comb Amtrak/Mbta & Orng in Suffolk County, Massachusetts. It was built in 1981, so it is 44 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 5,450 vehicles a day, roughly 1% of them trucks, projected to reach 1,106 by 2030. The structure is 81 ft (24.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Prentiss ST
CrossesComb Amtrak/Mbta & Orng
Location1st Br S of Ruggles ST
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.33351, -71.09302
Functional classUrban Local

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 inspectionSeptember 2022
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating87.5 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span44 ft (13.4 m)
Deck width45 ft (13.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,450 (2022)
Projected traffic1,106 by 2030
Trucks1%
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

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Prentiss ST over Comb Amtrak/Mbta & Orng built?

It was built in 1981, making it 44 years old in 2025.

What condition is HWY Prentiss ST over Comb Amtrak/Mbta & Orng 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 September 2022.

How much traffic does HWY Prentiss ST over Comb Amtrak/Mbta & Orng carry?

About 5,450 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is HWY Prentiss ST over Comb Amtrak/Mbta & Orng?

The structure is 81 ft (24.7 m) long with a longest span of 44 ft (13.4 m) and a deck 45 ft wide.

Who owns HWY Prentiss ST over Comb Amtrak/Mbta & Orng?

It is owned by the Other State Agency.