US Bridges

11N74 over South Fork American

Good

El Dorado County, California · No Data Entered · Structure no. 050356000003012

Built
2004
21 years old
Condition
Good
inspected September 2024
Type
Truss - Thru
Steel
Length
140 ft
1 main span
Daily traffic
10
2016 count
Owner
Federal
U.S. Forest Service

About this bridge

11N74 over South Fork American is a steel truss - thru carrying 11N74 over South Fork American in El Dorado County, California. It was built in 2004, so it is 21 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 10 vehicles a day, projected to reach 15 by 2045. The structure is 140 ft (42.7 m) long and 13 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Carries11N74
CrossesSouth Fork American
LocationNo Data Entered
RouteFederal Lands Road 11N74
Coordinates38.76393, -120.33736
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation*: *
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating—
Inventory rating—

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span139 ft (42.5 m)
Deck width13 ft (4.1 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2016)
Projected traffic15 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
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 11N74 over South Fork American built?

It was built in 2004, making it 21 years old in 2025.

What condition is 11N74 over South Fork American 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 September 2024.

How much traffic does 11N74 over South Fork American carry?

About 10 vehicles per day (2016 count).

How long is 11N74 over South Fork American?

The structure is 140 ft (42.7 m) long with a longest span of 139 ft (42.5 m) and a deck 13 ft wide.

Who owns 11N74 over South Fork American?

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