US Bridges

ST 6 A/Crnbry HWY over Water Mill Creek

Fair

Barnstable County, Massachusetts · 1.5 M E of Bourne Tl · Structure no. S040034A5DOTNBI

Built
1951
74 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
19,914
2024 count
Owner
State
State Highway Agency

About this bridge

ST 6 A/Crnbry HWY over Water Mill Creek is a concrete continuous slab carrying ST 6 A/Crnbry HWY over Water Mill Creek in Barnstable County, Massachusetts. It was built in 1951, so it is 74 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 19,914 vehicles a day, roughly 5% of them trucks, projected to reach 18,952 by 2031. The structure is 62 ft (18.9 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesST 6 A/Crnbry HWY
CrossesWater Mill Creek
Location1.5 M E of Bourne Tl
RouteState Highway 6A
Coordinates41.76105, -70.49549
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.1 US tons
Inventory rating33.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length62 ft (18.9 m)
Longest span20 ft (6.1 m)
Deck width53 ft (16.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,914 (2024)
Projected traffic18,952 by 2031
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 6 A/Crnbry HWY over Water Mill Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is ST 6 A/Crnbry HWY over Water Mill Creek 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 August 2024.

How much traffic does ST 6 A/Crnbry HWY over Water Mill Creek carry?

About 19,914 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is ST 6 A/Crnbry HWY over Water Mill Creek?

The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 53 ft wide.

Who owns ST 6 A/Crnbry HWY over Water Mill Creek?

It is owned by the State Highway Agency.