US Bridges

HWY Main RD over Water Dunbar Brook

Fair

Franklin County, Massachusetts · 0.2M W of Nrth RD · Structure no. M260010HYMUNNBI

Built
1948
77 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
62 ft
3 main spans
Daily traffic
259
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

HWY Main RD over Water Dunbar Brook is a steel continuous stringer/multi-beam or girder carrying HWY Main RD over Water Dunbar Brook in Franklin County, Massachusetts. It was built in 1948, so it is 77 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 259 vehicles a day, roughly 6% of them trucks, projected to reach 442 by 2032. The structure is 62 ft (18.9 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesHWY Main RD
CrossesWater Dunbar Brook
Location0.2M W of Nrth RD
RouteCity Street 0
CountyFranklin County
StateMassachusetts
Coordinates42.72128, -72.99468
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating47.1 US tons
Inventory rating28.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length62 ft (18.9 m)
Longest span36 ft (11 m)
Deck width25 ft (7.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic259 (2023)
Projected traffic442 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY Main RD over Water Dunbar Brook built?

It was built in 1948, making it 77 years old in 2025.

What condition is HWY Main RD over Water Dunbar Brook 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 July 2023.

How much traffic does HWY Main RD over Water Dunbar Brook carry?

About 259 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is HWY Main RD over Water Dunbar Brook?

The structure is 62 ft (18.9 m) long with a longest span of 36 ft (11 m) and a deck 25 ft wide.

Who owns HWY Main RD over Water Dunbar Brook?

It is owned by the Town or Township Highway Agency.