US Bridges

HWY Union Ave over Water Sudbury River

Good

Middlesex County, Massachusetts · .4 MI S of Main ST · Structure no. F07004246MUNNBI

Built
1985
40 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
14,143
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Union Ave over Water Sudbury River is a prestressed concrete stringer/multi-beam or girder carrying HWY Union Ave over Water Sudbury River in Middlesex County, Massachusetts. It was built in 1985, so it is 40 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.

It carries about 14,143 vehicles a day, roughly 5% of them trucks, projected to reach 54,012 by 2032. The structure is 59 ft (18 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHWY Union Ave
CrossesWater Sudbury River
Location.4 MI S of Main ST
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.29278, -71.42747
Functional classUrban Minor Arterial

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating75 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length59 ft (18 m)
Longest span58 ft (17.7 m)
Deck width45 ft (13.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,143 (2022)
Projected traffic54,012 by 2032
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Union Ave over Water Sudbury River built?

It was built in 1985, making it 40 years old in 2025.

What condition is HWY Union Ave over Water Sudbury River 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 July 2023.

How much traffic does HWY Union Ave over Water Sudbury River carry?

About 14,143 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is HWY Union Ave over Water Sudbury River?

The structure is 59 ft (18 m) long with a longest span of 58 ft (17.7 m) and a deck 45 ft wide.

Who owns HWY Union Ave over Water Sudbury River?

It is owned by the Town or Township Highway Agency.