US Bridges

Curly Jack Road over Elk Creek

Fair

Siskiyou County, California · 0.8 MI S of Elk Creek RD · Structure no. 02C0150

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
90 ft
1 main span
Daily traffic
624
2011 count
Owner
County
County Highway Agency

About this bridge

Curly Jack Road over Elk Creek is a concrete box beam or girders - multiple carrying Curly Jack Road over Elk Creek in Siskiyou County, California. It was built in 1975, so it is 50 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 624 vehicles a day, roughly 5% of them trucks, projected to reach 1,317 by 2046. The structure is 90 ft (27.4 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCurly Jack Road
CrossesElk Creek
Location0.8 MI S of Elk Creek RD
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.7805, -123.39283
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.2 US tons
Inventory rating61.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span88 ft (26.9 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic624 (2011)
Projected traffic1,317 by 2046
Trucks5%
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

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 Curly Jack Road over Elk Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Curly Jack Road over Elk 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 July 2024.

How much traffic does Curly Jack Road over Elk Creek carry?

About 624 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Curly Jack Road over Elk Creek?

The structure is 90 ft (27.4 m) long with a longest span of 88 ft (26.9 m) and a deck 21 ft wide.

Who owns Curly Jack Road over Elk Creek?

It is owned by the County Highway Agency.