US Bridges

ST146 NB over HWY Lackey Dam RD

Fair

Worcester County, Massachusetts · 1 Mi. N. of Hartford Ave · Structure no. U020401MVDOTNBI

Built
1950
75 years old, rebuilt 1983
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
93 ft
1 main span
Daily traffic
18,950
2023 count
Owner
State
State Highway Agency

About this bridge

ST146 NB over HWY Lackey Dam RD is a steel stringer/multi-beam or girder carrying ST146 NB over HWY Lackey Dam RD in Worcester County, Massachusetts. It was built in 1950 and reconstructed in 1983, 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 18,950 vehicles a day, roughly 15% of them trucks, projected to reach 20,531 by 2033. The structure is 93 ft (28.3 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST146 NB
CrossesHWY Lackey Dam RD
Location1 Mi. N. of Hartford Ave
RouteState Highway 146
CountyWorcester County
StateMassachusetts
Coordinates42.08963, -71.69516
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.2 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length93 ft (28.3 m)
Longest span81 ft (24.7 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,950 (2023)
Projected traffic20,531 by 2033
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST146 NB over HWY Lackey Dam RD built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1983.

What condition is ST146 NB over HWY Lackey Dam RD 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 ST146 NB over HWY Lackey Dam RD carry?

About 18,950 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is ST146 NB over HWY Lackey Dam RD?

The structure is 93 ft (28.3 m) long with a longest span of 81 ft (24.7 m) and a deck 48 ft wide.

Who owns ST146 NB over HWY Lackey Dam RD?

It is owned by the State Highway Agency.