US Bridges

HWY School ST over Water Stony Brook

Fair

Middlesex County, Massachusetts · 1.0 KM SE of Main ST · Structure no. C080052BCMUNNBI

Built
1850
175 years old
Condition
Fair
inspected September 2023
Type
Arch - Deck
Masonry
Length
40 ft
2 main spans
Daily traffic
3,750
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY School ST over Water Stony Brook is a masonry arch - deck carrying HWY School ST over Water Stony Brook in Middlesex County, Massachusetts. It was built in 1850, so it is 175 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 3,750 vehicles a day, roughly 13% of them trucks, projected to reach 5,685 by 2032. The structure is 40 ft (12.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY School ST
CrossesWater Stony Brook
Location1.0 KM SE of Main ST
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.61787, -71.40215
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37 US tons
Inventory rating36.9 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans2
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span18 ft (5.5 m)
Deck width43 ft (13.1 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2019)
Projected traffic5,685 by 2032
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY School ST over Water Stony Brook built?

It was built in 1850, making it 175 years old in 2025.

What condition is HWY School 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 September 2023.

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

About 3,750 vehicles per day (2019 count), of which roughly 13% are trucks.

How long is HWY School ST over Water Stony Brook?

The structure is 40 ft (12.2 m) long with a longest span of 18 ft (5.5 m) and a deck 43 ft wide.

Who owns HWY School ST over Water Stony Brook?

It is owned by the Town or Township Highway Agency.