US Bridges

ST 3 Off Ramp NB over Water Mill River

Fair

Norfolk County, Massachusetts · .16 KM N of ST 3 · Structure no. W32029352DOTNBI

Built
1957
68 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
8,276
2025 count
Owner
State
State Highway Agency

About this bridge

ST 3 Off Ramp NB over Water Mill River is a concrete continuous culvert carrying ST 3 Off Ramp NB over Water Mill River in Norfolk County, Massachusetts. It was built in 1957, so it is 68 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.

It carries about 8,276 vehicles a day, roughly 3% of them trucks, projected to reach 12,792 by 2032. The structure is 35 ft (10.7 m) long and 60 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesST 3 Off Ramp NB
CrossesWater Mill River
Location.16 KM N of ST 3
RouteState Highway 3
CountyNorfolk County
StateMassachusetts
Coordinates42.1965, -70.95482
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating75.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length35 ft (10.7 m)
Longest span17 ft (5.2 m)
Deck width60 ft (18.3 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,276 (2025)
Projected traffic12,792 by 2032
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$502,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 3 Off Ramp NB over Water Mill River built?

It was built in 1957, making it 68 years old in 2025.

What condition is ST 3 Off Ramp NB over Water Mill 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 January 2025.

How much traffic does ST 3 Off Ramp NB over Water Mill River carry?

About 8,276 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is ST 3 Off Ramp NB over Water Mill River?

The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m) and a deck 60 ft wide.

Who owns ST 3 Off Ramp NB over Water Mill River?

It is owned by the State Highway Agency.