US Bridges

Platina Road over Mid Fork Cottonwood Crk

Fair

Shasta County, California · 10.3 MI E of S.R. 36 · Structure no. 06C0117

Built
1920
105 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
96
2005 count
Owner
County
County Highway Agency

About this bridge

Platina Road over Mid Fork Cottonwood Crk is a concrete tee beam carrying Platina Road over Mid Fork Cottonwood Crk in Shasta County, California. It was built in 1920, so it is 105 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.

It carries about 96 vehicles a day, roughly 5% of them trucks, projected to reach 310 by 2044. The structure is 28 ft (8.5 m) long and 19 ft wide. If it were closed, the detour would be 72.1 mi (116 km).

Location

Open in Google Maps
CarriesPlatina Road
CrossesMid Fork Cottonwood Crk
Location10.3 MI E of S.R. 36
RouteCounty Highway 0
CountyShasta County
StateCalifornia
Coordinates40.40226, -122.77955
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width19 ft (5.8 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2005)
Projected traffic310 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed72.1 mi (116 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 Platina Road over Mid Fork Cottonwood Crk built?

It was built in 1920, making it 105 years old in 2025.

What condition is Platina Road over Mid Fork Cottonwood Crk 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 September 2024.

How much traffic does Platina Road over Mid Fork Cottonwood Crk carry?

About 96 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is Platina Road over Mid Fork Cottonwood Crk?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 19 ft wide.

Who owns Platina Road over Mid Fork Cottonwood Crk?

It is owned by the County Highway Agency.