US Bridges

Van Duzen Road over Holly Creek

Good

Trinity County, California · 11.8 MI South SR 36 · Structure no. 05C0097

Built
1977
48 years old
Condition
Good
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
578
2020 count
Owner
County
County Highway Agency

About this bridge

Van Duzen Road over Holly Creek is a prestressed concrete tee beam carrying Van Duzen Road over Holly Creek in Trinity County, California. It was built in 1977, so it is 48 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 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 578 vehicles a day, roughly 2% of them trucks, projected to reach 600 by 2042. The structure is 41 ft (12.6 m) long and 29 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesVan Duzen Road
CrossesHolly Creek
Location11.8 MI South SR 36
RouteCounty Highway 0
CountyTrinity County
StateCalifornia
Coordinates40.32555, -123.45505
Functional classRural Major Collector

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating27.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length41 ft (12.6 m)
Longest span40 ft (12.2 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic578 (2020)
Projected traffic600 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 Van Duzen Road over Holly Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Van Duzen Road over Holly 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 June 2023.

How much traffic does Van Duzen Road over Holly Creek carry?

About 578 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Van Duzen Road over Holly Creek?

The structure is 41 ft (12.6 m) long with a longest span of 40 ft (12.2 m) and a deck 29 ft wide.

Who owns Van Duzen Road over Holly Creek?

It is owned by the County Highway Agency.