US Bridges

State Route 36 over M. Fork Cottonwood Creek

Good

Shasta County, California · 02-SHA-036-7.58 · Structure no. 06 0209

Built
2005
20 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
121 ft
1 main span
Daily traffic
570
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 36 over M. Fork Cottonwood Creek is a prestressed concrete box beam or girders - single or spread carrying State Route 36 over M. Fork Cottonwood Creek in Shasta County, California. It was built in 2005, so it is 20 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 570 vehicles a day, roughly 12% of them trucks, projected to reach 918 by 2040. The structure is 121 ft (36.8 m) long and 34 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

CarriesState Route 36
CrossesM. Fork Cottonwood Creek
Location02-SHA-036-7.58
RouteState Highway 36
Coordinates40.35993, -122.91063
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length121 ft (36.8 m)
Longest span116 ft (35.4 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (2009)
Projected traffic918 by 2040
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 36 over M. Fork Cottonwood Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is State Route 36 over M. Fork Cottonwood Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does State Route 36 over M. Fork Cottonwood Creek carry?

About 570 vehicles per day (2009 count), of which roughly 12% are trucks.

How long is State Route 36 over M. Fork Cottonwood Creek?

The structure is 121 ft (36.8 m) long with a longest span of 116 ft (35.4 m) and a deck 34 ft wide.

Who owns State Route 36 over M. Fork Cottonwood Creek?

It is owned by the State Highway Agency.