US Bridges

HWY Mechanic ST over Water Monoosnoc Brook

Fair

Worcester County, Massachusetts · .1 M East of St. 12 · Structure no. L080041CBMUNNBI

Built
1873
152 years old
Condition
Fair
inspected June 2023
Type
Arch - Deck
Masonry
Length
24 ft
1 main span
Daily traffic
11,250
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Mechanic ST over Water Monoosnoc Brook is a masonry arch - deck carrying HWY Mechanic ST over Water Monoosnoc Brook in Worcester County, Massachusetts. It was built in 1873, so it is 152 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 11,250 vehicles a day, roughly 7% of them trucks, projected to reach 21,147 by 2032. The structure is 24 ft (7.3 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Mechanic ST
CrossesWater Monoosnoc Brook
Location.1 M East of St. 12
RouteCity Street 0
CountyWorcester County
StateMassachusetts
Coordinates42.52624, -71.75856
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width50 ft (15.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,250 (2023)
Projected traffic21,147 by 2032
Trucks7%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Mechanic ST over Water Monoosnoc Brook built?

It was built in 1873, making it 152 years old in 2025.

What condition is HWY Mechanic ST over Water Monoosnoc 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 June 2023.

How much traffic does HWY Mechanic ST over Water Monoosnoc Brook carry?

About 11,250 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is HWY Mechanic ST over Water Monoosnoc Brook?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 50 ft wide.

Who owns HWY Mechanic ST over Water Monoosnoc Brook?

It is owned by the City or Municipal Highway Agency.