US Bridges

ST 28 Chas R Dm RD over Water Charles River

Fair

Suffolk County, Massachusetts · .1 MI NW of Nashua ST · Structure no. B160134EMDOTNBI

Built
1910
115 years old, rebuilt 2011
Condition
Fair
inspected December 2023
Type
Movable - Bascule
Steel
Length
91 ft
1 main span
Daily traffic
27,554
2022 count
Owner
State
State Highway Agency

About this bridge

ST 28 Chas R Dm RD over Water Charles River is a steel movable - bascule carrying ST 28 Chas R Dm RD over Water Charles River in Suffolk County, Massachusetts. It was built in 1910 and reconstructed in 2011, so it is 115 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 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 27,554 vehicles a day, roughly 4% of them trucks, projected to reach 69,489 by 2032. The structure is 91 ft (27.7 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 28 Chas R Dm RD
CrossesWater Charles River
Location.1 MI NW of Nashua ST
RouteState Highway 28
CountySuffolk County
StateMassachusetts
Coordinates42.36715, -71.06911
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.8 US tons
Inventory rating54.8 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckClosed grating
Main spans1 (+2 approach)
Design loadHS 25 or greater
Structure length91 ft (27.7 m)
Longest span63 ft (19.2 m)
Deck width84 ft (25.7 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,554 (2022)
Projected traffic69,489 by 2032
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$4.8 million (2025 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was ST 28 Chas R Dm RD over Water Charles River built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 2011.

What condition is ST 28 Chas R Dm RD 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 December 2023.

How much traffic does ST 28 Chas R Dm RD over Water Charles River carry?

About 27,554 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is ST 28 Chas R Dm RD over Water Charles River?

The structure is 91 ft (27.7 m) long with a longest span of 63 ft (19.2 m) and a deck 84 ft wide.

Who owns ST 28 Chas R Dm RD over Water Charles River?

It is owned by the State Highway Agency.