US Bridges

Sq___ Valley Creek over Yet Atwam Creek

Good

Shasta County, California · No Data Entered · Structure no. 051461000001110

Built
1970
55 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
130 ft
2 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Sq___ Valley Creek over Yet Atwam Creek is a steel stringer/multi-beam or girder carrying Sq___ Valley Creek over Yet Atwam Creek in Shasta County, California. It was built in 1970, so it is 55 years old, older 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 130 ft (39.6 m) long and 30 ft wide.

CarriesSq___ Valley Creek
CrossesYet Atwam Creek
LocationNo Data Entered
RouteFederal Lands Road 39N21
Coordinates41.14409, -122.1704
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span97 ft (29.6 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sq___ Valley Creek over Yet Atwam Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Sq___ Valley Creek over Yet Atwam 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 June 2024.

How much traffic does Sq___ Valley Creek over Yet Atwam Creek carry?

About 50 vehicles per day (latest count).

How long is Sq___ Valley Creek over Yet Atwam Creek?

The structure is 130 ft (39.6 m) long with a longest span of 97 ft (29.6 m) and a deck 30 ft wide.

Who owns Sq___ Valley Creek over Yet Atwam Creek?

It is owned by the U.S. Forest Service.