US Bridges

Carbondale Road over Willow Creek

Good

Amador County, California · 0.6 MI Sw/O SR 16 · Structure no. 26C0050

Built
2005
20 years old
Condition
Good
inspected April 2024
Type
Slab
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
523
2010 count
Owner
County
County Highway Agency

About this bridge

Carbondale Road over Willow Creek is a prestressed concrete slab carrying Carbondale Road over Willow Creek in Amador 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 523 vehicles a day, roughly 4% of them trucks, projected to reach 1,224 by 2042. The structure is 45 ft (13.7 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCarbondale Road
CrossesWillow Creek
Location0.6 MI Sw/O SR 16
RouteCounty Highway 0
Coordinates38.4464, -120.91823
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 protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 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

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length45 ft (13.7 m)
Longest span45 ft (13.7 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic523 (2010)
Projected traffic1,224 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Carbondale Road over Willow Creek built?

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

What condition is Carbondale Road over Willow 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 April 2024.

How much traffic does Carbondale Road over Willow Creek carry?

About 523 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is Carbondale Road over Willow Creek?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.7 m) and a deck 32 ft wide.

Who owns Carbondale Road over Willow Creek?

It is owned by the County Highway Agency.