US Bridges

Crazy Peak Road over Dunn Creek

Good

Del Norte County, California · 12MI S & 2MI E of 97523 · Structure no. 061104000001053

Built
1988
37 years old
Condition
Good
inspected June 2022
Type
Slab
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
12
1993 count
Owner
Federal
U.S. Forest Service

About this bridge

Crazy Peak Road over Dunn Creek is a prestressed concrete slab carrying Crazy Peak Road over Dunn Creek in Del Norte County, California. It was built in 1988, so it is 37 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 12 vehicles a day, projected to reach 18 by 2045. The structure is 59 ft (18 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesCrazy Peak Road
CrossesDunn Creek
Location12MI S & 2MI E of 97523
RouteFederal Lands Road 49060
Coordinates41.9965, -123.61633
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 protection8 Very GoodNo problems noted.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85.1 US tons
Inventory rating53 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length59 ft (18 m)
Longest span55 ft (16.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12 (1993)
Projected traffic18 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Crazy Peak Road over Dunn Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Crazy Peak Road over Dunn 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 2022.

How much traffic does Crazy Peak Road over Dunn Creek carry?

About 12 vehicles per day (1993 count).

How long is Crazy Peak Road over Dunn Creek?

The structure is 59 ft (18 m) long with a longest span of 55 ft (16.8 m) and a deck 16 ft wide.

Who owns Crazy Peak Road over Dunn Creek?

It is owned by the U.S. Forest Service.