US Bridges

U.S. Highway 101 over Little Lost Man Creek

Good

Humboldt County, California · 01-HUM-101-124.48 · Structure no. 04 0312

Built
2020
5 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
4,200
2019 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over Little Lost Man Creek is a prestressed concrete slab carrying U.S. Highway 101 over Little Lost Man Creek in Humboldt County, California. It was built in 2020, so it is 5 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,200 vehicles a day, roughly 12% of them trucks, projected to reach 5,500 by 2042. The structure is 70 ft (21.2 m) long and 45 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesU.S. Highway 101
CrossesLittle Lost Man Creek
Location01-HUM-101-124.48
RouteU.S. Route 101
Coordinates41.32811, -124.03025
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length70 ft (21.2 m)
Longest span65 ft (19.8 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2019)
Projected traffic5,500 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 U.S. Highway 101 over Little Lost Man Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is U.S. Highway 101 over Little Lost Man 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 July 2024.

How much traffic does U.S. Highway 101 over Little Lost Man Creek carry?

About 4,200 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is U.S. Highway 101 over Little Lost Man Creek?

The structure is 70 ft (21.2 m) long with a longest span of 65 ft (19.8 m) and a deck 45 ft wide.

Who owns U.S. Highway 101 over Little Lost Man Creek?

It is owned by the State Highway Agency.