US Bridges

Richardson Highway over Lower Suzy Q Creek

Good

Southeast Fairbanks Census Area, Alaska · Mile Point 227.3 · Structure no. 0589

Built
1990
35 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
280
2020 count
Owner
State
State Highway Agency

About this bridge

Richardson Highway over Lower Suzy Q Creek is a prestressed concrete tee beam carrying Richardson Highway over Lower Suzy Q Creek in Southeast Fairbanks Census Area, Alaska. It was built in 1990, so it is 35 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 280 vehicles a day, roughly 21% of them trucks, projected to reach 330 by 2039. The structure is 36 ft (11 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRichardson Highway
CrossesLower Suzy Q Creek
LocationMile Point 227.3
RouteState Highway 71
StateAlaska
Coordinates63.4902, -145.8582
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2020)
Projected traffic330 by 2039
Trucks21%
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 Richardson Highway over Lower Suzy Q Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Richardson Highway over Lower Suzy Q Creek 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 July 2023.

How much traffic does Richardson Highway over Lower Suzy Q Creek carry?

About 280 vehicles per day (2020 count), of which roughly 21% are trucks.

How long is Richardson Highway over Lower Suzy Q Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 31 ft wide.

Who owns Richardson Highway over Lower Suzy Q Creek?

It is owned by the State Highway Agency.