US Bridges

U.S. Highway 97 over Whitney Creek

Fair

Siskiyou County, California · 02-SIS-097-9.61 · Structure no. 02 0083

Built
1982
43 years old
Condition
Fair
inspected April 2023
Type
Arch - Deck
Steel
Length
23 ft
1 main span
Daily traffic
5,000
2015 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 97 over Whitney Creek is a steel arch - deck carrying U.S. Highway 97 over Whitney Creek in Siskiyou County, California. It was built in 1982, so it is 43 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,000 vehicles a day, roughly 38% of them trucks, projected to reach 6,609 by 2040. The structure is 23 ft (7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesU.S. Highway 97
CrossesWhitney Creek
Location02-SIS-097-9.61
RouteU.S. Route 97
Coordinates41.52401, -122.28529
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length23 ft (7 m)
Longest span23 ft (6.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2015)
Projected traffic6,609 by 2040
Trucks38%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

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 U.S. Highway 97 over Whitney Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is U.S. Highway 97 over Whitney Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does U.S. Highway 97 over Whitney Creek carry?

About 5,000 vehicles per day (2015 count), of which roughly 38% are trucks.

How long is U.S. Highway 97 over Whitney Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (6.9 m).

Who owns U.S. Highway 97 over Whitney Creek?

It is owned by the State Highway Agency.