US Bridges

ST 16 Myst Val Pky over Water Mystic River

Fair

Middlesex County, Massachusetts · .2 MI E of Winthrop ST · Structure no. M120034DTDOTNBI

Built
1906
119 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete
Length
64 ft
1 main span
Daily traffic
26,600
2024 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 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 26,600 vehicles a day, roughly 5% of them trucks, projected to reach 83,703 by 2031. The structure is 64 ft (19.5 m) long and 63 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.2 MI E of Winthrop ST
RouteState Highway 16
CountyMiddlesex County
StateMassachusetts
Coordinates42.41803, -71.1126
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating66 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length64 ft (19.5 m)
Longest span64 ft (19.5 m)
Deck width63 ft (19.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,600 (2024)
Projected traffic83,703 by 2031
Trucks5%
Lanes on structure2
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.7 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 July 2024.

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

About 26,600 vehicles per day (2024 count), of which roughly 5% are trucks.

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

The structure is 64 ft (19.5 m) long with a longest span of 64 ft (19.5 m) and a deck 63 ft wide.

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

It is owned by the State Highway Agency.