US Bridges

El Monte Ave over Dead Horse Slough

Fair

Butte County, California · 0.1 MI N SR 32 · Structure no. 12C0392

Built
1979
46 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
72 ft
3 main spans
Daily traffic
628
2007 count
Owner
County
County Highway Agency

About this bridge

El Monte Ave over Dead Horse Slough is a concrete continuous slab carrying El Monte Ave over Dead Horse Slough in Butte County, California. It was built in 1979, so it is 46 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 6 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 628 vehicles a day, roughly 5% of them trucks, projected to reach 579 by 2042. The structure is 72 ft (22 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesEl Monte Ave
CrossesDead Horse Slough
Location0.1 MI N SR 32
RouteCounty Highway 0
Coordinates39.74138, -121.80019
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating86.8 US tons
Inventory rating52.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length72 ft (22 m)
Longest span28 ft (8.6 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic628 (2007)
Projected traffic579 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 El Monte Ave over Dead Horse Slough built?

It was built in 1979, making it 46 years old in 2025.

What condition is El Monte Ave over Dead Horse 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 October 2024.

How much traffic does El Monte Ave over Dead Horse Slough carry?

About 628 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is El Monte Ave over Dead Horse Slough?

The structure is 72 ft (22 m) long with a longest span of 28 ft (8.6 m) and a deck 32 ft wide.

Who owns El Monte Ave over Dead Horse Slough?

It is owned by the County Highway Agency.