US Bridges

ST114 /Washington over RR MBTA (tunnel)

Fair

Essex County, Massachusetts · Down Town Salem · Structure no. S0101932UDOT634

Built
1955
70 years old
Condition
Fair
inspected December 2023
Type
Frame
Steel
Length
36 ft
1 main span
Daily traffic
32,000
2015 count
Owner
State
State Highway Agency

About this bridge

ST114 /Washington over RR MBTA (tunnel) is a steel frame carrying ST114 /Washington over RR MBTA (tunnel) in Essex County, Massachusetts. It was built in 1955, so it is 70 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 6 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 32,000 vehicles a day, roughly 6% of them trucks, projected to reach 43,431 by 2032. The structure is 36 ft (11 m) long and 1,000 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST114 /Washington
CrossesRR MBTA (tunnel)
LocationDown Town Salem
RouteState Highway 0
CountyEssex County
StateMassachusetts
Coordinates42.52391, -70.89597
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 alignment7: Better than present minimum criteria
Operating rating68.5 US tons
Inventory rating41 US tons

Structure

Structure typeFrame
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length36 ft (11 m)
Longest span32 ft (9.8 m)
Deck width1,000 ft (304.8 m)
Roadway width1,000 ft (304.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,000 (2015)
Projected traffic43,431 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$7.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST114 /Washington over RR MBTA (tunnel) built?

It was built in 1955, making it 70 years old in 2025.

What condition is ST114 /Washington over RR MBTA (tunnel) 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 December 2023.

How much traffic does ST114 /Washington over RR MBTA (tunnel) carry?

About 32,000 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is ST114 /Washington over RR MBTA (tunnel)?

The structure is 36 ft (11 m) long with a longest span of 32 ft (9.8 m) and a deck 1,000 ft wide.

Who owns ST114 /Washington over RR MBTA (tunnel)?

It is owned by the State Highway Agency.