US Bridges

Guintoli Lane over US Highway 101

Fair

Humboldt County, California · 01-HUM-101-88.80-ARC · Structure no. 04 0157

Built
1969
56 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
179 ft
1 main span
Daily traffic
11,131
2010 count
Owner
State
State Highway Agency

About this bridge

Guintoli Lane over US Highway 101 is a prestressed concrete box beam or girders - multiple carrying Guintoli Lane over US Highway 101 in Humboldt County, California. It was built in 1969, so it is 56 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 11,131 vehicles a day, roughly 5% of them trucks, projected to reach 21,448 by 2041. The structure is 179 ft (54.7 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGuintoli Lane
CrossesUS Highway 101
Location01-HUM-101-88.80-ARC
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.90431, -124.08715
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating32.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length179 ft (54.7 m)
Longest span178 ft (54.3 m)
Deck width48 ft (14.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,131 (2010)
Projected traffic21,448 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 Guintoli Lane over US Highway 101 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Guintoli Lane over US Highway 101 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 2023.

How much traffic does Guintoli Lane over US Highway 101 carry?

About 11,131 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Guintoli Lane over US Highway 101?

The structure is 179 ft (54.7 m) long with a longest span of 178 ft (54.3 m) and a deck 48 ft wide.

Who owns Guintoli Lane over US Highway 101?

It is owned by the State Highway Agency.