US Bridges

ST 18 over HWY Logan ST

Fair

Bristol County, Massachusetts · .1 MI S of I 195 · Structure no. N060233PKDOTNBI

Built
1965
60 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
1 main span
Daily traffic
45,236
2023 count
Owner
State
State Highway Agency

About this bridge

ST 18 over HWY Logan ST is a steel stringer/multi-beam or girder carrying ST 18 over HWY Logan ST in Bristol County, Massachusetts. It was built in 1965, so it is 60 years old, younger 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 45,236 vehicles a day, roughly 4% of them trucks, projected to reach 112,288 by 2031. The structure is 48 ft (14.6 m) long and 109 ft wide.

Location

Open in Google Maps
CarriesST 18
CrossesHWY Logan ST
Location.1 MI S of I 195
RouteState Highway 18
CountyBristol County
StateMassachusetts
Coordinates41.65141, -70.92798
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length48 ft (14.6 m)
Longest span43 ft (13 m)
Deck width109 ft (33.2 m)
Roadway width96 ft (29.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,236 (2023)
Projected traffic112,288 by 2031
Trucks4%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$4.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 18 over HWY Logan ST built?

It was built in 1965, making it 60 years old in 2025.

What condition is ST 18 over HWY Logan 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 June 2024.

How much traffic does ST 18 over HWY Logan ST carry?

About 45,236 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is ST 18 over HWY Logan ST?

The structure is 48 ft (14.6 m) long with a longest span of 43 ft (13 m) and a deck 109 ft wide.

Who owns ST 18 over HWY Logan ST?

It is owned by the State Highway Agency.