US Bridges

Island Road over Fall River

Fair

Shasta County, California · 0.5 MI N Mcarthur RD · Structure no. 06C0205

Built
1994
31 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
228 ft
6 main spans
Daily traffic
400
2014 count
Owner
County
County Highway Agency

About this bridge

Island Road over Fall River is a prestressed concrete slab carrying Island Road over Fall River in Shasta County, California. It was built in 1994, so it is 31 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 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 400 vehicles a day, roughly 10% of them trucks, projected to reach 459 by 2041. The structure is 228 ft (69.5 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIsland Road
CrossesFall River
Location0.5 MI N Mcarthur RD
RouteCounty Highway 0
Coordinates41.0883, -121.49321
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length228 ft (69.5 m)
Longest span38 ft (11.6 m)
Deck width30 ft (9 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2014)
Projected traffic459 by 2041
Trucks10%
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Island Road over Fall River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Island Road over Fall 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 May 2023.

How much traffic does Island Road over Fall River carry?

About 400 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Island Road over Fall River?

The structure is 228 ft (69.5 m) long with a longest span of 38 ft (11.6 m) and a deck 30 ft wide.

Who owns Island Road over Fall River?

It is owned by the County Highway Agency.