US Bridges

Boulder Creek RD over Canyon Creek

Fair

Siskiyou County, California · 0.1 MI SW Scott River RD · Structure no. 02C0166

Built
1993
32 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
8
2011 count
Owner
County
County Highway Agency

About this bridge

Boulder Creek RD over Canyon Creek is a steel stringer/multi-beam or girder carrying Boulder Creek RD over Canyon Creek in Siskiyou County, California. It was built in 1993, so it is 32 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 8 vehicles a day, roughly 1% of them trucks, projected to reach 32 by 2042. The structure is 56 ft (17 m) long and 10 ft wide.

Location

Open in Google Maps
CarriesBoulder Creek RD
CrossesCanyon Creek
Location0.1 MI SW Scott River RD
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.63222, -123.10443
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length56 ft (17 m)
Longest span52 ft (16 m)
Deck width10 ft (3.2 m)
Roadway width10 ft (3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8 (2011)
Projected traffic32 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Boulder Creek RD over Canyon Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Boulder Creek RD over Canyon 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 August 2024.

How much traffic does Boulder Creek RD over Canyon Creek carry?

About 8 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Boulder Creek RD over Canyon Creek?

The structure is 56 ft (17 m) long with a longest span of 52 ft (16 m) and a deck 10 ft wide.

Who owns Boulder Creek RD over Canyon Creek?

It is owned by the County Highway Agency.