US Bridges

ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L

Good

Suffolk County, Massachusetts · Segment 3 · Structure no. B1659057UMPANBI

Built
2002
23 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
334 ft
2 main spans
Daily traffic
—
Owner
State
State Highway Agency

About this bridge

ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L is a prestressed concrete continuous box beam or girders - single or spread carrying ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L in Suffolk County, Massachusetts. It was built in 2002, so it is 23 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

No traffic count is recorded. The structure is 334 ft (101.8 m) long and 43 ft wide.

CarriesST 1 A/Rp E-1ASB
CrossesComb ST 1A NB & Blue L
LocationSegment 3
RouteState Highway 1A
Coordinates42.374, -71.03099
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating74.5 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length334 ft (101.8 m)
Longest span170 ft (51.8 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$13.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L built?

It was built in 2002, making it 23 years old in 2025.

What condition is ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L carry?

No traffic count is recorded for this structure.

How long is ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L?

The structure is 334 ft (101.8 m) long with a longest span of 170 ft (51.8 m) and a deck 43 ft wide.

Who owns ST 1 A/Rp E-1ASB over Comb ST 1A NB & Blue L?

It is owned by the State Highway Agency.