US Bridges

Guintoli Lane over State Route 299

Good

Humboldt County, California · 01-HUM-299-0.72-ARC · Structure no. 04 0231

Built
1969
56 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
160 ft
1 main span
Daily traffic
5,644
2010 count
Owner
State
State Highway Agency

About this bridge

Guintoli Lane over State Route 299 is a prestressed concrete box beam or girders - multiple carrying Guintoli Lane over State Route 299 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 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 5,644 vehicles a day, roughly 15% of them trucks, projected to reach 15,556 by 2047. The structure is 160 ft (48.8 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesGuintoli Lane
CrossesState Route 299
Location01-HUM-299-0.72-ARC
RouteCounty Highway 0
Coordinates40.90427, -124.0738
Functional classUrban Minor Arterial

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.
Last inspectionJanuary 2025
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 rating62.8 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span159 ft (48.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,644 (2010)
Projected traffic15,556 by 2047
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 State Route 299 built?

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

What condition is Guintoli Lane over State Route 299 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 January 2025.

How much traffic does Guintoli Lane over State Route 299 carry?

About 5,644 vehicles per day (2010 count), of which roughly 15% are trucks.

How long is Guintoli Lane over State Route 299?

The structure is 160 ft (48.8 m) long with a longest span of 159 ft (48.5 m) and a deck 42 ft wide.

Who owns Guintoli Lane over State Route 299?

It is owned by the State Highway Agency.