US Bridges

Edgerton/Mccarthy over Liberty Falls Creek

Fair

County 066, Alaska · Mile Point 23.7 · Structure no. 0279

Built
1963
62 years old
Condition
Fair
inspected August 2023
Type
Arch - Deck
Steel
Length
175 ft
1 main span
Daily traffic
440
2020 count
Owner
State
State Highway Agency

About this bridge

Edgerton/Mccarthy over Liberty Falls Creek is a steel arch - deck carrying Edgerton/Mccarthy over Liberty Falls Creek in County 066, Alaska. It was built in 1963, so it is 62 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 440 vehicles a day, roughly 11% of them trucks, projected to reach 520 by 2039. The structure is 175 ft (53.3 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesEdgerton/Mccarthy
CrossesLiberty Falls Creek
LocationMile Point 23.7
RouteState Highway 850
CountyCounty 066
StateAlaska
Coordinates61.6225, -144.54722
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.6 US tons
Inventory rating39.6 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length175 ft (53.3 m)
Longest span95 ft (29 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2020)
Projected traffic520 by 2039
Trucks11%
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 byState 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 Edgerton/Mccarthy over Liberty Falls Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Edgerton/Mccarthy over Liberty Falls 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 August 2023.

How much traffic does Edgerton/Mccarthy over Liberty Falls Creek carry?

About 440 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Edgerton/Mccarthy over Liberty Falls Creek?

The structure is 175 ft (53.3 m) long with a longest span of 95 ft (29 m) and a deck 36 ft wide.

Who owns Edgerton/Mccarthy over Liberty Falls Creek?

It is owned by the State Highway Agency.