US Bridges

Edgerton/Mccarthy over Lakina River

Good

County 066, Alaska · Mile Point 77.5 · Structure no. 1195

Built
2016
9 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
336 ft
3 main spans
Daily traffic
70
2020 count
Owner
State
State Highway Agency

About this bridge

Edgerton/Mccarthy over Lakina River is a prestressed concrete tee beam carrying Edgerton/Mccarthy over Lakina River in County 066, Alaska. It was built in 2016, so it is 9 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 70 vehicles a day, roughly 11% of them trucks, projected to reach 90 by 2039. The structure is 336 ft (102.4 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesEdgerton/Mccarthy
CrossesLakina River
LocationMile Point 77.5
RouteState Highway 850
StateAlaska
Coordinates61.37444, -143.34889
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating101.5 US tons
Inventory rating60.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHL 93
Structure length336 ft (102.4 m)
Longest span112 ft (34.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2020)
Projected traffic90 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 Lakina River built?

It was built in 2016, making it 9 years old in 2025.

What condition is Edgerton/Mccarthy over Lakina 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 August 2023.

How much traffic does Edgerton/Mccarthy over Lakina River carry?

About 70 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Edgerton/Mccarthy over Lakina River?

The structure is 336 ft (102.4 m) long with a longest span of 112 ft (34.1 m) and a deck 27 ft wide.

Who owns Edgerton/Mccarthy over Lakina River?

It is owned by the State Highway Agency.