US Bridges

Alpina Road over Bonaparte Creek

Good

Jefferson County, New York · Main Impact Area · Structure no. DAPFORDRU000012

Built
2009
16 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
5
2022 count
Owner
Federal
Army

About this bridge

Alpina Road over Bonaparte Creek is a steel stringer/multi-beam or girder carrying Alpina Road over Bonaparte Creek in Jefferson 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 5 vehicles a day, projected to reach 20 by 2046. The structure is 36 ft (11 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesAlpina Road
CrossesBonaparte Creek
LocationMain Impact Area
CountyJefferson County
StateNew York
Coordinates44.13913, -75.48032
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.2 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span32 ft (9.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic20 by 2046
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerArmy
Maintained byArmy
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$15,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Alpina Road over Bonaparte Creek built?

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

What condition is Alpina Road over Bonaparte 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 May 2024.

How much traffic does Alpina Road over Bonaparte Creek carry?

About 5 vehicles per day (2022 count).

How long is Alpina Road over Bonaparte Creek?

The structure is 36 ft (11 m) long with a longest span of 32 ft (9.8 m) and a deck 26 ft wide.

Who owns Alpina Road over Bonaparte Creek?

It is owned by the Army.