US Bridges

County Road 21 over Mettawee River

Good

Washington County, New York · 2.5 MI N JCT SH22 & SH22A · Structure no. 000000003306320

Built
2007
18 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
141 ft
1 main span
Daily traffic
999
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 21 over Mettawee River is a steel stringer/multi-beam or girder carrying County Road 21 over Mettawee River in Washington County, New York. It was built in 2007, so it is 18 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 999 vehicles a day, roughly 7% of them trucks, projected to reach 1,399 by 2040. The structure is 141 ft (43 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesCounty Road 21
CrossesMettawee River
Location2.5 MI N JCT SH22 & SH22A
RouteCounty Highway 0
CountyWashington County
StateNew York
Coordinates43.46404, -73.28395
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length141 ft (43 m)
Longest span136 ft (41.5 m)
Deck width33 ft (10 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic999 (2020)
Projected traffic1,399 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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$2.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 21 over Mettawee River built?

It was built in 2007, making it 18 years old in 2025.

What condition is County Road 21 over Mettawee River 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 May 2023.

How much traffic does County Road 21 over Mettawee River carry?

About 999 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is County Road 21 over Mettawee River?

The structure is 141 ft (43 m) long with a longest span of 136 ft (41.5 m) and a deck 33 ft wide.

Who owns County Road 21 over Mettawee River?

It is owned by the County Highway Agency.