US Bridges

US 20 Bostn Pst RD over Water Sudbury River

Good

Middlesex County, Massachusetts · .75 Mi. W. of ST-27 · Structure no. W110016G2DOTNBI

Built
2009
16 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
1 main span
Daily traffic
14,603
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Bostn Pst RD over Water Sudbury River is a prestressed concrete stringer/multi-beam or girder carrying US 20 Bostn Pst RD over Water Sudbury River in Middlesex County, Massachusetts. It was built in 2009, so it is 16 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 14,603 vehicles a day, roughly 10% of them trucks, projected to reach 47,853 by 2031. The structure is 112 ft (34.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 20 Bostn Pst RD
CrossesWater Sudbury River
Location.75 Mi. W. of ST-27
RouteCity Street 0
Coordinates42.36328, -71.37463
Functional classUrban Other Principal 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.6 US tons
Inventory rating51.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length112 ft (34.2 m)
Longest span108 ft (33 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,603 (2023)
Projected traffic47,853 by 2031
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 20 Bostn Pst RD over Water Sudbury River built?

It was built in 2009, making it 16 years old in 2025.

What condition is US 20 Bostn Pst RD 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 June 2024.

How much traffic does US 20 Bostn Pst RD over Water Sudbury River carry?

About 14,603 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 20 Bostn Pst RD over Water Sudbury River?

The structure is 112 ft (34.2 m) long with a longest span of 108 ft (33 m) and a deck 39 ft wide.

Who owns US 20 Bostn Pst RD over Water Sudbury River?

It is owned by the State Highway Agency.