US Bridges

Route 11 over Upper Clear Creek

FairPosted for load

Shasta County, California · 0.2 Miles N of HWY 299 (m · Structure no. 8750005S0000000

Built
1940
85 years old, rebuilt 1977
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
2 main spans
Daily traffic
30
2013 count
Owner
Federal
National Park Service

About this bridge

Route 11 over Upper Clear Creek is a steel stringer/multi-beam or girder carrying Route 11 over Upper Clear Creek in Shasta County, California. It was built in 1940 and reconstructed in 1977, so it is 85 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 30 vehicles a day, projected to reach 100 by 2033. The structure is 100 ft (30.5 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRoute 11
CrossesUpper Clear Creek
Location0.2 Miles N of HWY 299 (m
RouteFederal Lands Road 410
CountyShasta County
StateCalifornia
Coordinates40.66819, -122.63386
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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19 US tons
Inventory rating14 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadUnknown
Structure length100 ft (30.5 m)
Longest span60 ft (18.3 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2013)
Projected traffic100 by 2033
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$563,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 11 over Upper Clear Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1977.

What condition is Route 11 over Upper Clear Creek 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 July 2023.

How much traffic does Route 11 over Upper Clear Creek carry?

About 30 vehicles per day (2013 count).

How long is Route 11 over Upper Clear Creek?

The structure is 100 ft (30.5 m) long with a longest span of 60 ft (18.3 m) and a deck 14 ft wide.

Who owns Route 11 over Upper Clear Creek?

It is owned by the National Park Service.