US Bridges

State Route 3 over Kidder Creek

Fair

Siskiyou County, California · 02-SIS-003-27.09 · Structure no. 02 0052

Built
1956
69 years old, rebuilt 1986
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
2,825
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 3 over Kidder Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 3 over Kidder Creek in Siskiyou County, California. It was built in 1956 and reconstructed in 1986, so it is 69 years old, older 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 5 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 2,825 vehicles a day, projected to reach 3,594 by 2040. The structure is 156 ft (47.5 m) long and 35 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesState Route 3
CrossesKidder Creek
Location02-SIS-003-27.09
RouteState Highway 3
Coordinates41.54324, -122.90472
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.6 US tons
Inventory rating56.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length156 ft (47.5 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,825 (2015)
Projected traffic3,594 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 State Route 3 over Kidder Creek built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.

What condition is State Route 3 over Kidder 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 September 2023.

How much traffic does State Route 3 over Kidder Creek carry?

About 2,825 vehicles per day (2015 count).

How long is State Route 3 over Kidder Creek?

The structure is 156 ft (47.5 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

Who owns State Route 3 over Kidder Creek?

It is owned by the State Highway Agency.