US Bridges

HWY Donald Lynch over Water Assabet River

Fair

Middlesex County, Massachusetts · Entrance to Sol Pond Mall · Structure no. M06023AX4MUNNBI

Built
1984
41 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
1 main span
Daily traffic
8,400
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Donald Lynch over Water Assabet River is a steel stringer/multi-beam or girder carrying HWY Donald Lynch over Water Assabet River in Middlesex County, Massachusetts. It was built in 1984, so it is 41 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 8,400 vehicles a day, roughly 5% of them trucks, projected to reach 47,379 by 2031. The structure is 64 ft (19.5 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHWY Donald Lynch
CrossesWater Assabet River
LocationEntrance to Sol Pond Mall
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.35327, -71.61569
Functional classUrban Local

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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.1 US tons
Inventory rating40.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span58 ft (17.7 m)
Deck width54 ft (16.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,400 (2024)
Projected traffic47,379 by 2031
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Donald Lynch over Water Assabet River built?

It was built in 1984, making it 41 years old in 2025.

What condition is HWY Donald Lynch over Water Assabet 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 May 2024.

How much traffic does HWY Donald Lynch over Water Assabet River carry?

About 8,400 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is HWY Donald Lynch over Water Assabet River?

The structure is 64 ft (19.5 m) long with a longest span of 58 ft (17.7 m) and a deck 54 ft wide.

Who owns HWY Donald Lynch over Water Assabet River?

It is owned by the City or Municipal Highway Agency.