US Bridges

HWY Bridge ST over Water Charles River

Fair

Middlesex County, Massachusetts · .96 KM E Waltham · Structure no. N120112CNMUNNBI

Built
1967
58 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
96 ft
1 main span
Daily traffic
21,500
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Bridge ST over Water Charles River is a prestressed concrete stringer/multi-beam or girder carrying HWY Bridge ST over Water Charles River in Middlesex County, Massachusetts. It was built in 1967, so it is 58 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 21,500 vehicles a day, roughly 4% of them trucks, projected to reach 37,429 by 2031. The structure is 96 ft (29.3 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHWY Bridge ST
CrossesWater Charles River
Location.96 KM E Waltham
RouteCity Street 0
Coordinates42.36577, -71.20449
Functional classUrban Collector

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length96 ft (29.3 m)
Longest span90 ft (27.4 m)
Deck width55 ft (16.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,500 (2024)
Projected traffic37,429 by 2031
Trucks4%
Lanes on structure2
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$842,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Bridge ST over Water Charles River built?

It was built in 1967, making it 58 years old in 2025.

What condition is HWY Bridge ST over Water Charles 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 August 2024.

How much traffic does HWY Bridge ST over Water Charles River carry?

About 21,500 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Bridge ST over Water Charles River?

The structure is 96 ft (29.3 m) long with a longest span of 90 ft (27.4 m) and a deck 55 ft wide.

Who owns HWY Bridge ST over Water Charles River?

It is owned by the City or Municipal Highway Agency.