US Bridges

Edgerton/Mccarthy over Copper River (chitina)

Fair

County 066, Alaska · Mile Point 34.7 · Structure no. 0205

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,378 ft
8 main spans
Daily traffic
180
2020 count
Owner
State
State Highway Agency

About this bridge

Edgerton/Mccarthy over Copper River (chitina) is a steel continuous stringer/multi-beam or girder carrying Edgerton/Mccarthy over Copper River (chitina) in County 066, Alaska. It was built in 1971, so it is 54 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 5 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 180 vehicles a day, roughly 11% of them trucks, projected to reach 220 by 2039. The structure is 1,378 ft (420.1 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesEdgerton/Mccarthy
CrossesCopper River (chitina)
LocationMile Point 34.7
RouteState Highway 850
CountyCounty 066
StateAlaska
Coordinates61.52583, -144.41167
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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.6 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length1,378 ft (420.1 m)
Longest span310 ft (94.5 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic220 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 Copper River (chitina) built?

It was built in 1971, making it 54 years old in 2025.

What condition is Edgerton/Mccarthy over Copper River (chitina) 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 Copper River (chitina) carry?

About 180 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Edgerton/Mccarthy over Copper River (chitina)?

The structure is 1,378 ft (420.1 m) long with a longest span of 310 ft (94.5 m) and a deck 31 ft wide.

Who owns Edgerton/Mccarthy over Copper River (chitina)?

It is owned by the State Highway Agency.