US Bridges

Parks Highway over Sunshine Overhead

Good

Matanuska-Susitna Borough, Alaska · Mile Point 64.9 · Structure no. 2312

Built
2016
9 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
137 ft
1 main span
Daily traffic
2,110
2020 count
Owner
State
State Highway Agency

About this bridge

Parks Highway over Sunshine Overhead is a prestressed concrete tee beam carrying Parks Highway over Sunshine Overhead in Matanuska-Susitna Borough, 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,110 vehicles a day, roughly 26% of them trucks, projected to reach 3,180 by 2039. The structure is 137 ft (41.8 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesParks Highway
CrossesSunshine Overhead
LocationMile Point 64.9
RouteInterstate 0A42
StateAlaska
Coordinates62.14752, -150.08125
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating64.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length137 ft (41.8 m)
Longest span133 ft (40.5 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,110 (2020)
Projected traffic3,180 by 2039
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Parks Highway over Sunshine Overhead built?

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

What condition is Parks Highway over Sunshine Overhead 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 June 2024.

How much traffic does Parks Highway over Sunshine Overhead carry?

About 2,110 vehicles per day (2020 count), of which roughly 26% are trucks.

How long is Parks Highway over Sunshine Overhead?

The structure is 137 ft (41.8 m) long with a longest span of 133 ft (40.5 m) and a deck 43 ft wide.

Who owns Parks Highway over Sunshine Overhead?

It is owned by the State Highway Agency.