US Bridges

US 3 Cd NB over ST110 Chelmsford ST

Fair

Middlesex County, Massachusetts · 0.8 KM N of I 495 · Structure no. C0801285PDOTNBI

Built
2004
21 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
99 ft
1 main span
Daily traffic
27,673
2019 count
Owner
State
State Highway Agency

About this bridge

US 3 Cd NB over ST110 Chelmsford ST is a steel stringer/multi-beam or girder carrying US 3 Cd NB over ST110 Chelmsford ST in Middlesex County, Massachusetts. It was built in 2004, so it is 21 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 27,673 vehicles a day, roughly 15% of them trucks, projected to reach 17,372 by 2032. The structure is 99 ft (30.1 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 3 Cd NB
CrossesST110 Chelmsford ST
Location0.8 KM N of I 495
RouteU.S. Route 3
CountyMiddlesex County
StateMassachusetts
Coordinates42.61356, -71.32829
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.4 US tons
Inventory rating63.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length99 ft (30.1 m)
Longest span93 ft (28.4 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,673 (2019)
Projected traffic17,372 by 2032
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 3 Cd NB over ST110 Chelmsford ST built?

It was built in 2004, making it 21 years old in 2025.

What condition is US 3 Cd NB over ST110 Chelmsford ST 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 2023.

How much traffic does US 3 Cd NB over ST110 Chelmsford ST carry?

About 27,673 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is US 3 Cd NB over ST110 Chelmsford ST?

The structure is 99 ft (30.1 m) long with a longest span of 93 ft (28.4 m) and a deck 40 ft wide.

Who owns US 3 Cd NB over ST110 Chelmsford ST?

It is owned by the State Highway Agency.