US Bridges

Irr:airport Road over Wilson Creek

Good

County 158, Alaska · Marshall · Structure no. 2125

Built
2012
13 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
121 ft
1 main span
Daily traffic
19
2018 count
Owner
State
State Highway Agency

About this bridge

Irr:airport Road over Wilson Creek is a steel stringer/multi-beam or girder carrying Irr:airport Road over Wilson Creek in County 158, Alaska. It was built in 2012, so it is 13 years old, younger than the Alaska average of 35.9 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 19 vehicles a day, roughly 1% of them trucks, projected to reach 30 by 2035. The structure is 121 ft (36.9 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIrr:airport Road
CrossesWilson Creek
LocationMarshall
RouteState Highway 0
CountyCounty 158
StateAlaska
Coordinates61.87318, -162.04317
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating61.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length121 ft (36.9 m)
Longest span117 ft (35.7 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19 (2018)
Projected traffic30 by 2035
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Irr:airport Road over Wilson Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is Irr:airport Road over Wilson 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 July 2024.

How much traffic does Irr:airport Road over Wilson Creek carry?

About 19 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Irr:airport Road over Wilson Creek?

The structure is 121 ft (36.9 m) long with a longest span of 117 ft (35.7 m) and a deck 23 ft wide.

Who owns Irr:airport Road over Wilson Creek?

It is owned by the State Highway Agency and maintained by the City or Municipal Highway Agency.