US Bridges

ST 18 Bedford ST over Water Forge Pond

FairPosted for load

Plymouth County, Massachusetts · .25 MI N of Central ST · Structure no. E0100347VDOTNBI

Built
1893
132 years old, rebuilt 1940
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
73 ft
1 main span
Daily traffic
24,500
2024 count
Owner
State
State Highway Agency

About this bridge

ST 18 Bedford ST over Water Forge Pond is a masonry arch - deck carrying ST 18 Bedford ST over Water Forge Pond in Plymouth County, Massachusetts. It was built in 1893 and reconstructed in 1940, so it is 132 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: posted for load restriction.

It carries about 24,500 vehicles a day, roughly 6% of them trucks, projected to reach 47,853 by 2032. The structure is 73 ft (22.3 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesST 18 Bedford ST
CrossesWater Forge Pond
Location.25 MI N of Central ST
RouteState Highway 18
Coordinates42.03568, -70.95812
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.3 US tons
Inventory rating20.5 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadH 20
Structure length73 ft (22.3 m)
Longest span30 ft (9.1 m)
Deck width61 ft (18.7 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,500 (2024)
Projected traffic47,853 by 2032
Trucks6%
Lanes on structure2
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 18 Bedford ST over Water Forge Pond built?

It was built in 1893, making it 132 years old in 2025. It was reconstructed in 1940.

What condition is ST 18 Bedford ST over Water Forge Pond 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 April 2024.

How much traffic does ST 18 Bedford ST over Water Forge Pond carry?

About 24,500 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is ST 18 Bedford ST over Water Forge Pond?

The structure is 73 ft (22.3 m) long with a longest span of 30 ft (9.1 m) and a deck 61 ft wide.

Who owns ST 18 Bedford ST over Water Forge Pond?

It is owned by the State Highway Agency.