US Bridges

ST146 NB over ST 16 Douglas ST

Fair

Worcester County, Massachusetts · 2 Miles West of ST-122 · Structure no. U020461MTDOTNBI

Built
1950
75 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
16,652
2023 count
Owner
State
State Highway Agency

About this bridge

ST146 NB over ST 16 Douglas ST is a steel stringer/multi-beam or girder carrying ST146 NB over ST 16 Douglas ST in Worcester County, Massachusetts. It was built in 1950, so it is 75 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 16,652 vehicles a day, roughly 4% of them trucks, projected to reach 23,690 by 2032. The structure is 50 ft (15.2 m) long and 47 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesST146 NB
CrossesST 16 Douglas ST
Location2 Miles West of ST-122
RouteState Highway 146
CountyWorcester County
StateMassachusetts
Coordinates42.06728, -71.66585
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.2 US tons
Inventory rating33.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length50 ft (15.2 m)
Longest span42 ft (12.8 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,652 (2023)
Projected traffic23,690 by 2032
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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$2.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST146 NB over ST 16 Douglas ST built?

It was built in 1950, making it 75 years old in 2025.

What condition is ST146 NB over ST 16 Douglas ST 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 January 2025.

How much traffic does ST146 NB over ST 16 Douglas ST carry?

About 16,652 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is ST146 NB over ST 16 Douglas ST?

The structure is 50 ft (15.2 m) long with a longest span of 42 ft (12.8 m) and a deck 47 ft wide.

Who owns ST146 NB over ST 16 Douglas ST?

It is owned by the State Highway Agency.