US Bridges

Copper River HWY over Copper Delta

PoorClosed to traffic

County 063, Alaska · Mile Point 37.0 · Structure no. 0342

Built
1977
48 years old, rebuilt 1988
Condition
Poor
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
880 ft
11 main spans
Daily traffic
94
2011 count
Owner
State
State Highway Agency

About this bridge

Copper River HWY over Copper Delta is a prestressed concrete tee beam carrying Copper River HWY over Copper Delta in County 063, Alaska. It was built in 1977 and reconstructed in 1988, so it is 48 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 94 vehicles a day, roughly 1% of them trucks, projected to reach 150 by 2030. The structure is 880 ft (268.3 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCopper River HWY
CrossesCopper Delta
LocationMile Point 37.0
RouteState Highway 851
StateAlaska
Coordinates60.52147, -144.83474
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating35.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans11
Design loadHS 20 + Mod
Structure length880 ft (268.3 m)
Longest span80 ft (24.4 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94 (2011)
Projected traffic150 by 2030
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 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 Copper River HWY over Copper Delta built?

It was built in 1977, making it 48 years old in 2025. It was reconstructed in 1988.

What condition is Copper River HWY over Copper Delta in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Copper River HWY over Copper Delta carry?

About 94 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Copper River HWY over Copper Delta?

The structure is 880 ft (268.3 m) long with a longest span of 80 ft (24.4 m) and a deck 29 ft wide.

Who owns Copper River HWY over Copper Delta?

It is owned by the State Highway Agency.