US Bridges

US 6 Wb/Md Cp HWY over ST132 Iyannough RD

Fair

Barnstable County, Massachusetts · 1. MI E of Oak ST · Structure no. B0101946GDOTNBI

Built
1966
59 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
2 main spans
Daily traffic
20,143
2025 count
Owner
State
State Highway Agency

About this bridge

US 6 Wb/Md Cp HWY over ST132 Iyannough RD is a steel stringer/multi-beam or girder carrying US 6 Wb/Md Cp HWY over ST132 Iyannough RD in Barnstable County, Massachusetts. It was built in 1966, so it is 59 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 20,143 vehicles a day, roughly 11% of them trucks, projected to reach 83,703 by 2032. The structure is 163 ft (49.6 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesUS 6 Wb/Md Cp HWY
CrossesST132 Iyannough RD
Location1. MI E of Oak ST
RouteU.S. Route 6
CountyBarnstable County
StateMassachusetts
Coordinates41.68794, -70.33619
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length163 ft (49.6 m)
Longest span80 ft (24.3 m)
Deck width46 ft (14 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,143 (2025)
Projected traffic83,703 by 2032
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$7.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 6 Wb/Md Cp HWY over ST132 Iyannough RD built?

It was built in 1966, making it 59 years old in 2025.

What condition is US 6 Wb/Md Cp HWY over ST132 Iyannough 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 February 2025.

How much traffic does US 6 Wb/Md Cp HWY over ST132 Iyannough RD carry?

About 20,143 vehicles per day (2025 count), of which roughly 11% are trucks.

How long is US 6 Wb/Md Cp HWY over ST132 Iyannough RD?

The structure is 163 ft (49.6 m) long with a longest span of 80 ft (24.3 m) and a deck 46 ft wide.

Who owns US 6 Wb/Md Cp HWY over ST132 Iyannough RD?

It is owned by the State Highway Agency.