US Bridges

I 93 NB over Water Shawsheen River

Fair

Essex County, Massachusetts · 2.5 MI S of ST-133 · Structure no. A090232J4DOTNBI

Built
1958
67 years old, rebuilt 1972
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
74,084
2019 count
Owner
State
State Highway Agency

About this bridge

I 93 NB over Water Shawsheen River is a prestressed concrete stringer/multi-beam or girder carrying I 93 NB over Water Shawsheen River in Essex County, Massachusetts. It was built in 1958 and reconstructed in 1972, so it is 67 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 74,084 vehicles a day, roughly 10% of them trucks, projected to reach 213,837 by 2032. The structure is 52 ft (15.7 m) long and 71 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesI 93 NB
CrossesWater Shawsheen River
Location2.5 MI S of ST-133
RouteInterstate 93
Coordinates42.61478, -71.17472
Functional classUrban Principal Arterial - Interstate

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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.7 US tons
Inventory rating33.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.7 m)
Longest span47 ft (14.2 m)
Deck width71 ft (21.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74,084 (2019)
Projected traffic213,837 by 2032
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$3.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 93 NB over Water Shawsheen River built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1972.

What condition is I 93 NB over Water Shawsheen River 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 2023.

How much traffic does I 93 NB over Water Shawsheen River carry?

About 74,084 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is I 93 NB over Water Shawsheen River?

The structure is 52 ft (15.7 m) long with a longest span of 47 ft (14.2 m) and a deck 71 ft wide.

Who owns I 93 NB over Water Shawsheen River?

It is owned by the State Highway Agency.