US Bridges

Island Road over Little Tule River

Poor

Shasta County, California · 2.3 MI N of Arthur RD · Structure no. 06C0281

Built
1950
75 years old
Condition
Poor
inspected May 2023
Type
Truss - Thru
Steel
Length
42 ft
1 main span
Daily traffic
100
2014 count
Owner
County
County Highway Agency

About this bridge

Island Road over Little Tule River is a steel truss - thru carrying Island Road over Little Tule River in Shasta County, California. It was built in 1950, so it is 75 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 390 by 2041. The structure is 42 ft (12.8 m) long and 13 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIsland Road
CrossesLittle Tule River
Location2.3 MI N of Arthur RD
RouteCounty Highway 0
CountyShasta County
StateCalifornia
Coordinates41.10938, -121.49193
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating24.3 US tons
Inventory rating14.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width13 ft (3.9 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2014)
Projected traffic390 by 2041
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$200,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Island Road over Little Tule River built?

It was built in 1950, making it 75 years old in 2025.

What condition is Island Road over Little Tule River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Island Road over Little Tule River carry?

About 100 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Island Road over Little Tule River?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 13 ft wide.

Who owns Island Road over Little Tule River?

It is owned by the County Highway Agency.