US Bridges

County Road 21 over Chemung Canal Ab

Good

Chemung County, New York · North of Horseheads · Structure no. 000000003331110

Built
1997
28 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
6,612
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 21 over Chemung Canal Ab is a prestressed concrete box beam or girders - multiple carrying County Road 21 over Chemung Canal Ab in Chemung County, New York. It was built in 1997, so it is 28 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,612 vehicles a day, roughly 2% of them trucks, projected to reach 8,032 by 2041. The structure is 25 ft (7.6 m) long and 32 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCounty Road 21
CrossesChemung Canal Ab
LocationNorth of Horseheads
RouteCounty Highway 0
CountyChemung County
StateNew York
Coordinates42.18971, -76.83215
Functional classUrban Minor Arterial

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.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating68 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,612 (2020)
Projected traffic8,032 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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$559,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 21 over Chemung Canal Ab built?

It was built in 1997, making it 28 years old in 2025.

What condition is County Road 21 over Chemung Canal Ab 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 2023.

How much traffic does County Road 21 over Chemung Canal Ab carry?

About 6,612 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is County Road 21 over Chemung Canal Ab?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns County Road 21 over Chemung Canal Ab?

It is owned by the County Highway Agency.