US Bridges

County Road 21 over Kinderhook Creek

Fair

Columbia County, New York · At Kinderhook · Structure no. 000000003342130

Built
1930
95 years old, rebuilt 2001
Condition
Fair
inspected July 2024
Type
Truss - Thru
Steel
Length
123 ft
1 main span
Daily traffic
2,048
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 21 over Kinderhook Creek is a steel truss - thru carrying County Road 21 over Kinderhook Creek in Columbia County, New York. It was built in 1930 and reconstructed in 2001, so it is 95 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 2,048 vehicles a day, roughly 10% of them trucks, projected to reach 2,867 by 2041. The structure is 123 ft (37.5 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCounty Road 21
CrossesKinderhook Creek
LocationAt Kinderhook
RouteCounty Highway 0
CountyColumbia County
StateNew York
Coordinates42.3904, -73.69148
Functional classUrban Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating47 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length123 ft (37.5 m)
Longest span119 ft (36.4 m)
Deck width35 ft (10.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,048 (2021)
Projected traffic2,867 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$8.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 21 over Kinderhook Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2001.

What condition is County Road 21 over Kinderhook 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 July 2024.

How much traffic does County Road 21 over Kinderhook Creek carry?

About 2,048 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is County Road 21 over Kinderhook Creek?

The structure is 123 ft (37.5 m) long with a longest span of 119 ft (36.4 m) and a deck 35 ft wide.

Who owns County Road 21 over Kinderhook Creek?

It is owned by the County Highway Agency.