US Bridges

ST109 Bridge ST over Water Charles River

Fair

Norfolk County, Massachusetts · 1.3 KM NE of ST 128 · Structure no. D05004AX9DOTNBI

Built
2012
13 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
107 ft
3 main spans
Daily traffic
12,931
2024 count
Owner
State
State Highway Agency

About this bridge

ST109 Bridge ST over Water Charles River is a concrete continuous slab carrying ST109 Bridge ST over Water Charles River in Norfolk County, Massachusetts. It was built in 2012, so it is 13 years old, younger 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 12,931 vehicles a day, roughly 3% of them trucks. The structure is 107 ft (32.6 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST109 Bridge ST
CrossesWater Charles River
Location1.3 KM NE of ST 128
RouteState Highway 109
CountyNorfolk County
StateMassachusetts
Coordinates42.25423, -71.18112
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating78.8 US tons
Inventory rating47.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length107 ft (32.6 m)
Longest span40 ft (12.1 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,931 (2024)
Projected traffic—
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST109 Bridge ST over Water Charles River built?

It was built in 2012, making it 13 years old in 2025.

What condition is ST109 Bridge ST over Water Charles 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 September 2024.

How much traffic does ST109 Bridge ST over Water Charles River carry?

About 12,931 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is ST109 Bridge ST over Water Charles River?

The structure is 107 ft (32.6 m) long with a longest span of 40 ft (12.1 m) and a deck 36 ft wide.

Who owns ST109 Bridge ST over Water Charles River?

It is owned by the State Highway Agency.