US Bridges

Upper Palermo Road over Branch Wyman Ravine

Fair

Butte County, California · 0.2 MI NE Pinecrest RD · Structure no. 12C0140

Built
1975
50 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
41 ft
2 main spans
Daily traffic
3,909
2017 count
Owner
County
County Highway Agency

About this bridge

Upper Palermo Road over Branch Wyman Ravine is a concrete continuous slab carrying Upper Palermo Road over Branch Wyman Ravine in Butte County, California. It was built in 1975, so it is 50 years old, younger 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.

It carries about 3,909 vehicles a day, roughly 8% of them trucks, projected to reach 3,207 by 2041. The structure is 41 ft (12.5 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesUpper Palermo Road
CrossesBranch Wyman Ravine
Location0.2 MI NE Pinecrest RD
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.46139, -121.52899
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,909 (2017)
Projected traffic3,207 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Upper Palermo Road over Branch Wyman Ravine built?

It was built in 1975, making it 50 years old in 2025.

What condition is Upper Palermo Road over Branch Wyman Ravine 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 May 2023.

How much traffic does Upper Palermo Road over Branch Wyman Ravine carry?

About 3,909 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is Upper Palermo Road over Branch Wyman Ravine?

The structure is 41 ft (12.5 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns Upper Palermo Road over Branch Wyman Ravine?

It is owned by the County Highway Agency.