US Bridges

HWY Bridge ST over Water Stony Brook

FairPosted for load

Middlesex County, Massachusetts · 1 MI S of ST-40 · Structure no. W2600626HMUNNBI

Built
1870
155 years old
Condition
Fair
inspected February 2024
Type
Slab
Masonry
Length
28 ft
4 main spans
Daily traffic
3,400
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Bridge ST over Water Stony Brook is a masonry slab carrying HWY Bridge ST over Water Stony Brook in Middlesex County, Massachusetts. It was built in 1870, so it is 155 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 load restriction.

It carries about 3,400 vehicles a day, projected to reach 4,264 by 2033. The structure is 28 ft (8.5 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHWY Bridge ST
CrossesWater Stony Brook
Location1 MI S of ST-40
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.59279, -71.46866
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating99.8 US tons
Inventory rating53 US tons

Structure

Structure typeSlab
MaterialMasonry
DeckOther
Main spans4
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span6 ft (1.8 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2024)
Projected traffic4,264 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of relocation of road
Estimated improvement cost$3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Bridge ST over Water Stony Brook built?

It was built in 1870, making it 155 years old in 2025.

What condition is HWY Bridge ST over Water Stony Brook 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 February 2024.

How much traffic does HWY Bridge ST over Water Stony Brook carry?

About 3,400 vehicles per day (2024 count).

How long is HWY Bridge ST over Water Stony Brook?

The structure is 28 ft (8.5 m) long with a longest span of 6 ft (1.8 m) and a deck 23 ft wide.

Who owns HWY Bridge ST over Water Stony Brook?

It is owned by the Town or Township Highway Agency.