US Bridges

ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook

Fair

Middlesex County, Massachusetts · 1.25 MI N Drum Hill · Structure no. C080032MYDOT634

Built
1956
69 years old, rebuilt 2009
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
88 ft
2 main spans
Daily traffic
21,207
2019 count
Owner
State
State Highway Agency

About this bridge

ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook is a steel continuous stringer/multi-beam or girder carrying ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook in Middlesex County, Massachusetts. It was built in 1956 and reconstructed in 2009, so it is 69 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 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 21,207 vehicles a day, roughly 3% of them trucks, projected to reach 35,534 by 2032. The structure is 88 ft (26.8 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesST 3 A/Prncetn ST
CrossesComb Bmrr & Stony Brook
Location1.25 MI N Drum Hill
RouteState Highway 3A
CountyMiddlesex County
StateMassachusetts
Coordinates42.63567, -71.37901
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.1 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span45 ft (13.7 m)
Deck width47 ft (14.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,207 (2019)
Projected traffic35,534 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad and waterway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2009.

What condition is ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook 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 November 2023.

How much traffic does ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook carry?

About 21,207 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook?

The structure is 88 ft (26.8 m) long with a longest span of 45 ft (13.7 m) and a deck 47 ft wide.

Who owns ST 3 A/Prncetn ST over Comb Bmrr & Stony Brook?

It is owned by the State Highway Agency.