US Bridges

Mill ST over Little Chico Creek

Fair

Butte County, California · 0.1 MI N of 12th ST · Structure no. 12C0338

Built
1950
75 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete
Length
57 ft
1 main span
Daily traffic
2,500
2000 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mill ST over Little Chico Creek is a concrete tee beam carrying Mill ST over Little Chico Creek in Butte County, California. It was built in 1950, so it is 75 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 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 2,500 vehicles a day, roughly 3% of them trucks, projected to reach 3,133 by 2042. The structure is 57 ft (17.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMill ST
CrossesLittle Chico Creek
Location0.1 MI N of 12th ST
RouteCity Street 0
CountyButte County
StateCalifornia
Coordinates39.7282, -121.82572
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.4 US tons
Inventory rating16.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length57 ft (17.4 m)
Longest span56 ft (17.1 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2000)
Projected traffic3,133 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mill ST over Little Chico Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mill ST over Little Chico Creek 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 Mill ST over Little Chico Creek carry?

About 2,500 vehicles per day (2000 count), of which roughly 3% are trucks.

How long is Mill ST over Little Chico Creek?

The structure is 57 ft (17.4 m) long with a longest span of 56 ft (17.1 m) and a deck 30 ft wide.

Who owns Mill ST over Little Chico Creek?

It is owned by the City or Municipal Highway Agency.