US Bridges

ST 16 Myst Val Pky over Water Mystic River

FairPosted for load

Middlesex County, Massachusetts · .4 MI W of Winthrop ST · Structure no. M120054DUDOTNBI

Built
1906
119 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete
Length
60 ft
1 main span
Daily traffic
33,900
2021 count
Owner
State
State Highway Agency

About this bridge

ST 16 Myst Val Pky over Water Mystic River is a concrete arch - deck carrying ST 16 Myst Val Pky over Water Mystic River in Middlesex County, Massachusetts. It was built in 1906, so it is 119 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. Its operating status is: posted for other load-capacity restriction.

It carries about 33,900 vehicles a day, roughly 2% of them trucks, projected to reach 43,352 by 2032. The structure is 60 ft (18.3 m) long and 73 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
CrossesWater Mystic River
Location.4 MI W of Winthrop ST
RouteState Highway 16
CountyMiddlesex County
StateMassachusetts
Coordinates42.41816, -71.12676
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating101.1 US tons
Inventory rating60.5 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span60 ft (18.3 m)
Deck width73 ft (22.3 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,900 (2021)
Projected traffic43,352 by 2032
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$3.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 16 Myst Val Pky over Water Mystic River built?

It was built in 1906, making it 119 years old in 2025.

What condition is ST 16 Myst Val Pky over Water Mystic River 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 2023.

How much traffic does ST 16 Myst Val Pky over Water Mystic River carry?

About 33,900 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is ST 16 Myst Val Pky over Water Mystic River?

The structure is 60 ft (18.3 m) long with a longest span of 60 ft (18.3 m) and a deck 73 ft wide.

Who owns ST 16 Myst Val Pky over Water Mystic River?

It is owned by the State Highway Agency.