US Bridges

HWY Mill ST over ST146

Good

Worcester County, Massachusetts · .5 Mi.Wst.Of ST.146A · Structure no. U0204820RDOTNBI

Built
1984
41 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
187 ft
2 main spans
Daily traffic
288
2021 count
Owner
State
State Highway Agency

About this bridge

HWY Mill ST over ST146 is a steel continuous stringer/multi-beam or girder carrying HWY Mill ST over ST146 in Worcester County, Massachusetts. It was built in 1984, so it is 41 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 288 vehicles a day, roughly 1% of them trucks, projected to reach 632 by 2032. The structure is 187 ft (57 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHWY Mill ST
CrossesST146
Location.5 Mi.Wst.Of ST.146A
RouteCity Street 0
CountyWorcester County
StateMassachusetts
Coordinates42.05049, -71.63214
Functional classRural Local

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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length187 ft (57 m)
Longest span91 ft (27.7 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic288 (2021)
Projected traffic632 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Mill ST over ST146 built?

It was built in 1984, making it 41 years old in 2025.

What condition is HWY Mill ST over ST146 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 April 2023.

How much traffic does HWY Mill ST over ST146 carry?

About 288 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is HWY Mill ST over ST146?

The structure is 187 ft (57 m) long with a longest span of 91 ft (27.7 m) and a deck 40 ft wide.

Who owns HWY Mill ST over ST146?

It is owned by the State Highway Agency.