US Bridges

Parks Highway over Nenana River at Rex

Poor

Denali Borough, Alaska · Mile Point 240.3 · Structure no. 0216

Built
1963
62 years old
Condition
Poor
inspected July 2024
Type
Truss - Thru
Steel
Length
510 ft
1 main span
Daily traffic
910
2020 count
Owner
State
State Highway Agency

About this bridge

Parks Highway over Nenana River at Rex is a steel truss - thru carrying Parks Highway over Nenana River at Rex in Denali Borough, 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 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.

It carries about 910 vehicles a day, roughly 20% of them trucks, projected to reach 1,220 by 2039. The structure is 510 ft (155.4 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesParks Highway
CrossesNenana River at Rex
LocationMile Point 240.3
RouteInterstate 0A44
StateAlaska
Coordinates64.21791, -149.28096
Functional classRural Principal Arterial - Interstate

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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be 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 rating63.9 US tons
Inventory rating38.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length510 ft (155.4 m)
Longest span406 ft (123.7 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic910 (2020)
Projected traffic1,220 by 2039
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Parks Highway over Nenana River at Rex built?

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

What condition is Parks Highway over Nenana River at Rex 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 July 2024.

How much traffic does Parks Highway over Nenana River at Rex carry?

About 910 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Parks Highway over Nenana River at Rex?

The structure is 510 ft (155.4 m) long with a longest span of 406 ft (123.7 m) and a deck 35 ft wide.

Who owns Parks Highway over Nenana River at Rex?

It is owned by the State Highway Agency.