US Bridges

Trunk Road over Trunk Road O.C.

Good

Matanuska-Susitna Borough, Alaska · Mile Point 1.2 · Structure no. 1903

Built
2000
25 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Prestressed Concrete
Length
291 ft
2 main spans
Daily traffic
6,780
2020 count
Owner
State
State Highway Agency

About this bridge

Trunk Road over Trunk Road O.C. is a prestressed concrete tee beam carrying Trunk Road over Trunk Road O.C. in Matanuska-Susitna Borough, Alaska. It was built in 2000, so it is 25 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 6,780 vehicles a day, roughly 8% of them trucks, projected to reach 9,760 by 2039. The structure is 291 ft (88.8 m) long and 74 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTrunk Road
CrossesTrunk Road O.C.
LocationMile Point 1.2
RouteState Highway 0
CountyMatanuska-Susitna Borough
StateAlaska
Coordinates61.56274, -149.2662
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating59.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20 + Mod
Structure length291 ft (88.8 m)
Longest span143 ft (43.6 m)
Deck width74 ft (22.5 m)
Roadway width53 ft (16.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,780 (2020)
Projected traffic9,760 by 2039
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Trunk Road over Trunk Road O.C. built?

It was built in 2000, making it 25 years old in 2025.

What condition is Trunk Road over Trunk Road O.C. 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 Trunk Road over Trunk Road O.C. carry?

About 6,780 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Trunk Road over Trunk Road O.C.?

The structure is 291 ft (88.8 m) long with a longest span of 143 ft (43.6 m) and a deck 74 ft wide.

Who owns Trunk Road over Trunk Road O.C.?

It is owned by the State Highway Agency.