US Bridges

Tranquility Road over Cob Creek

Good

Greene County, New York · 5 MI W Coxsackie · Structure no. 000000003200760

Built
2009
16 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
57
2021 count
Owner
County
County Highway Agency

About this bridge

Tranquility Road over Cob Creek is a prestressed concrete box beam or girders - multiple carrying Tranquility Road over Cob Creek in Greene County, New York. It was built in 2009, so it is 16 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 57 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2041. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTranquility Road
CrossesCob Creek
Location5 MI W Coxsackie
Coordinates42.36991, -73.93497
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating89 US tons
Inventory rating52 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width25 ft (7.5 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2021)
Projected traffic80 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$805,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tranquility Road over Cob Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Tranquility Road over Cob Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Tranquility Road over Cob Creek carry?

About 57 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Tranquility Road over Cob Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 25 ft wide.

Who owns Tranquility Road over Cob Creek?

It is owned by the County Highway Agency.