US Bridges

Nelson Road over Creed Slough

Fair

Butte County, California · 0.7 MI E of 7 Mile Lane · Structure no. 12C0173

Built
1966
59 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
58 ft
2 main spans
Daily traffic
538
2019 count
Owner
County
County Highway Agency

About this bridge

Nelson Road over Creed Slough is a concrete continuous slab carrying Nelson Road over Creed Slough in Butte County, California. It was built in 1966, so it is 59 years old, older 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 538 vehicles a day, roughly 31% of them trucks, projected to reach 2,500 by 2043. The structure is 58 ft (17.7 m) long and 27 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesNelson Road
CrossesCreed Slough
Location0.7 MI E of 7 Mile Lane
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.55104, -121.89995
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span28 ft (8.5 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic538 (2019)
Projected traffic2,500 by 2043
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Nelson Road over Creed Slough built?

It was built in 1966, making it 59 years old in 2025.

What condition is Nelson Road over Creed 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 November 2024.

How much traffic does Nelson Road over Creed Slough carry?

About 538 vehicles per day (2019 count), of which roughly 31% are trucks.

How long is Nelson Road over Creed Slough?

The structure is 58 ft (17.7 m) long with a longest span of 28 ft (8.5 m) and a deck 27 ft wide.

Who owns Nelson Road over Creed Slough?

It is owned by the County Highway Agency.