US Bridges

ST 16 Myst Val Pky over I 93

Fair

Middlesex County, Massachusetts · 1.6 KM S of JCT SR 60 · Structure no. M120373EYDOTNBI

Built
1961
64 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
184 ft
2 main spans
Daily traffic
42,991
2023 count
Owner
State
State Highway Agency

About this bridge

ST 16 Myst Val Pky over I 93 is a steel stringer/multi-beam or girder carrying ST 16 Myst Val Pky over I 93 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 42,991 vehicles a day, roughly 8% of them trucks, projected to reach 61,909 by 2031. The structure is 184 ft (56.1 m) long and 84 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST 16 Myst Val Pky
CrossesI 93
Location1.6 KM S of JCT SR 60
RouteState Highway 16
CountyMiddlesex County
StateMassachusetts
Coordinates42.41368, -71.10384
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 inspectionOctober 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.5 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span85 ft (25.9 m)
Deck width84 ft (25.7 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,991 (2023)
Projected traffic61,909 by 2031
Trucks8%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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$14.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 16 Myst Val Pky over I 93 built?

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

What condition is ST 16 Myst Val Pky over I 93 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 October 2024.

How much traffic does ST 16 Myst Val Pky over I 93 carry?

About 42,991 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is ST 16 Myst Val Pky over I 93?

The structure is 184 ft (56.1 m) long with a longest span of 85 ft (25.9 m) and a deck 84 ft wide.

Who owns ST 16 Myst Val Pky over I 93?

It is owned by the State Highway Agency.