US Bridges

Stover Road over Mill Creek

Good

Humboldt County, California · 2.5 MI from Bair RD · Structure no. 04C0125

Built
1961
64 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
56
2011 count
Owner
County
County Highway Agency

About this bridge

Stover Road over Mill Creek is a concrete slab carrying Stover Road over Mill Creek in Humboldt County, California. It was built in 1961, so it is 64 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 56 vehicles a day, roughly 1% of them trucks, projected to reach 71 by 2041. The structure is 32 ft (9.9 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesStover Road
CrossesMill Creek
Location2.5 MI from Bair RD
RouteCounty Highway 0
Coordinates41.00178, -123.85874
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.9 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2011)
Projected traffic71 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Stover Road over Mill Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Stover Road over Mill Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Stover Road over Mill Creek carry?

About 56 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Stover Road over Mill Creek?

The structure is 32 ft (9.9 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Stover Road over Mill Creek?

It is owned by the County Highway Agency.