US Bridges

Chena Ridge/Pump R over Cripple Creek

Good

Fairbanks North Star Borough, Alaska · Mile Point 3.4 · Structure no. 1008

Built
1967
58 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
6,340
2020 count
Owner
State
State Highway Agency

About this bridge

Chena Ridge/Pump R over Cripple Creek is a steel stringer/multi-beam or girder carrying Chena Ridge/Pump R over Cripple Creek in Fairbanks North Star Borough, Alaska. It was built in 1967, so it is 58 years old, older 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 6,340 vehicles a day, roughly 8% of them trucks, projected to reach 8,120 by 2039. The structure is 58 ft (17.8 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesChena Ridge/Pump R
CrossesCripple Creek
LocationMile Point 3.4
RouteState Highway 645
StateAlaska
Coordinates64.83111, -147.88716
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.5 US tons
Inventory rating32.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length58 ft (17.8 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,340 (2020)
Projected traffic8,120 by 2039
Trucks8%
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 Chena Ridge/Pump R over Cripple Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is Chena Ridge/Pump R over Cripple 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 August 2024.

How much traffic does Chena Ridge/Pump R over Cripple Creek carry?

About 6,340 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Chena Ridge/Pump R over Cripple Creek?

The structure is 58 ft (17.8 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns Chena Ridge/Pump R over Cripple Creek?

It is owned by the State Highway Agency.