US Bridges

US 6 Wb/Md Cp HWY over HWY Mary Dunn RD

Fair

Barnstable County, Massachusetts · 1.25 M W of Willow ST · Structure no. B0101846LDOTNBI

Built
1953
72 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
132 ft
3 main spans
Daily traffic
19,239
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 Wb/Md Cp HWY over HWY Mary Dunn RD is a concrete continuous tee beam carrying US 6 Wb/Md Cp HWY over HWY Mary Dunn RD in Barnstable County, Massachusetts. It was built in 1953, so it is 72 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 19,239 vehicles a day, roughly 4% of them trucks, projected to reach 39,325 by 2031. The structure is 132 ft (40.2 m) long and 45 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS 6 Wb/Md Cp HWY
CrossesHWY Mary Dunn RD
Location1.25 M W of Willow ST
RouteU.S. Route 6
Coordinates41.68792, -70.28105
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.2 US tons
Inventory rating27.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length132 ft (40.2 m)
Longest span53 ft (16.2 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,239 (2023)
Projected traffic39,325 by 2031
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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$5.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 6 Wb/Md Cp HWY over HWY Mary Dunn RD built?

It was built in 1953, making it 72 years old in 2025.

What condition is US 6 Wb/Md Cp HWY over HWY Mary Dunn RD 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 2024.

How much traffic does US 6 Wb/Md Cp HWY over HWY Mary Dunn RD carry?

About 19,239 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 6 Wb/Md Cp HWY over HWY Mary Dunn RD?

The structure is 132 ft (40.2 m) long with a longest span of 53 ft (16.2 m) and a deck 45 ft wide.

Who owns US 6 Wb/Md Cp HWY over HWY Mary Dunn RD?

It is owned by the State Highway Agency.