US Bridges

HWY Bridge ST over Water Shawsheen River

Fair

Middlesex County, Massachusetts · 1 MI NW of Wilmington · Structure no. T030042C7MUNNBI

Built
1979
46 years old
Condition
Fair
inspected March 2024
Type
Culvert
Steel
Length
45 ft
3 main spans
Daily traffic
3,900
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Bridge ST over Water Shawsheen River is a steel culvert carrying HWY Bridge ST over Water Shawsheen River in Middlesex County, Massachusetts. It was built in 1979, so it is 46 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 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 3,900 vehicles a day, roughly 4% of them trucks, projected to reach 5,054 by 2033. The structure is 45 ft (13.7 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesHWY Bridge ST
CrossesWater Shawsheen River
Location1 MI NW of Wilmington
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.59456, -71.19562
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span14 ft (4.3 m)
Deck width34 ft (10.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2024)
Projected traffic5,054 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Bridge ST over Water Shawsheen River built?

It was built in 1979, making it 46 years old in 2025.

What condition is HWY Bridge ST 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 March 2024.

How much traffic does HWY Bridge ST over Water Shawsheen River carry?

About 3,900 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Bridge ST over Water Shawsheen River?

The structure is 45 ft (13.7 m) long with a longest span of 14 ft (4.3 m) and a deck 34 ft wide.

Who owns HWY Bridge ST over Water Shawsheen River?

It is owned by the Town or Township Highway Agency.