US Bridges

Lower Pass Road over Butte Slough

Fair

Sutter County, California · 1.1 MI W of W Butte Road · Structure no. 18C0111

Built
1996
29 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
162 ft
4 main spans
Daily traffic
355
2015 count
Owner
County
County Highway Agency

About this bridge

Lower Pass Road over Butte Slough is a concrete continuous slab carrying Lower Pass Road over Butte Slough in Sutter County, California. It was built in 1996, so it is 29 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 355 vehicles a day, roughly 5% of them trucks, projected to reach 468 by 2046. The structure is 162 ft (49.5 m) long and 31 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesLower Pass Road
CrossesButte Slough
Location1.1 MI W of W Butte Road
RouteCounty Highway 0
CountySutter County
StateCalifornia
Coordinates39.18714, -121.90928
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length162 ft (49.5 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic355 (2015)
Projected traffic468 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Lower Pass Road over Butte Slough built?

It was built in 1996, making it 29 years old in 2025.

What condition is Lower Pass Road over Butte Slough 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 February 2024.

How much traffic does Lower Pass Road over Butte Slough carry?

About 355 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Lower Pass Road over Butte Slough?

The structure is 162 ft (49.5 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Lower Pass Road over Butte Slough?

It is owned by the County Highway Agency.