US Bridges

ST 16 Myst Val Pky over ST 38 Main ST

Fair

Middlesex County, Massachusetts · 1 MI S of JCT SR 60 · Structure no. M120383F0DOTNBI

Built
1961
64 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
159 ft
3 main spans
Daily traffic
39,300
2024 count
Owner
State
State Highway Agency

About this bridge

ST 16 Myst Val Pky over ST 38 Main ST is a steel stringer/multi-beam or girder carrying ST 16 Myst Val Pky over ST 38 Main ST in Middlesex County, Massachusetts. It was built in 1961, so it is 64 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 39,300 vehicles a day, roughly 9% of them trucks, projected to reach 137,399 by 2031. The structure is 159 ft (48.5 m) long and 108 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 16 Myst Val Pky
CrossesST 38 Main ST
Location1 MI S of JCT SR 60
RouteState Highway 16
CountyMiddlesex County
StateMassachusetts
Coordinates42.41698, -71.11047
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
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 rating60.6 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length159 ft (48.5 m)
Longest span90 ft (27.4 m)
Deck width108 ft (33 m)
Roadway width102 ft (31.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,300 (2024)
Projected traffic137,399 by 2031
Trucks9%
Lanes on structure2
Traffic directionTwo-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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$15.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 16 Myst Val Pky over ST 38 Main ST built?

It was built in 1961, making it 64 years old in 2025.

What condition is ST 16 Myst Val Pky over ST 38 Main 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 December 2024.

How much traffic does ST 16 Myst Val Pky over ST 38 Main ST carry?

About 39,300 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is ST 16 Myst Val Pky over ST 38 Main ST?

The structure is 159 ft (48.5 m) long with a longest span of 90 ft (27.4 m) and a deck 108 ft wide.

Who owns ST 16 Myst Val Pky over ST 38 Main ST?

It is owned by the State Highway Agency.