US Bridges

Louie Road over Shasta River

FairPosted for load

Siskiyou County, California · 4.0 MI N/E of I-5 · Structure no. 02C0036

Built
1935
90 years old
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
220 ft
1 main span
Daily traffic
45
2011 count
Owner
County
County Highway Agency

About this bridge

Louie Road over Shasta River is a steel truss - thru carrying Louie Road over Shasta River in Siskiyou County, California. It was built in 1935, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 45 vehicles a day, roughly 5% of them trucks, projected to reach 65 by 2042. The structure is 220 ft (67.1 m) long and 14 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesLouie Road
CrossesShasta River
Location4.0 MI N/E of I-5
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.59038, -122.43807
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating20 US tons
Inventory rating12.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+12 approach)
Design loadUnknown
Structure length220 ft (67.1 m)
Longest span80 ft (24.4 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic45 (2011)
Projected traffic65 by 2042
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Louie Road over Shasta River built?

It was built in 1935, making it 90 years old in 2025.

What condition is Louie Road over Shasta River 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 June 2024.

How much traffic does Louie Road over Shasta River carry?

About 45 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Louie Road over Shasta River?

The structure is 220 ft (67.1 m) long with a longest span of 80 ft (24.4 m) and a deck 14 ft wide.

Who owns Louie Road over Shasta River?

It is owned by the County Highway Agency.