US Bridges

Prescott Drive over Johnson Gulch

Fair

Humboldt County, California · 2.2 MI East of Mattole RD · Structure no. 04C0184

Built
1973
52 years old, rebuilt 1995
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
9
2011 count
Owner
County
County Highway Agency

About this bridge

Prescott Drive over Johnson Gulch is a steel stringer/multi-beam or girder carrying Prescott Drive over Johnson Gulch in Humboldt County, California. It was built in 1973 and reconstructed in 1995, so it is 52 years old, younger 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 9 vehicles a day, projected to reach 29 by 2046. The structure is 35 ft (10.7 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesPrescott Drive
CrossesJohnson Gulch
Location2.2 MI East of Mattole RD
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.46031, -124.33658
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110 US tons
Inventory rating74.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span34 ft (10.5 m)
Deck width12 ft (3.8 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9 (2011)
Projected traffic29 by 2046
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Prescott Drive over Johnson Gulch built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1995.

What condition is Prescott Drive over Johnson Gulch 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 March 2024.

How much traffic does Prescott Drive over Johnson Gulch carry?

About 9 vehicles per day (2011 count).

How long is Prescott Drive over Johnson Gulch?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.5 m) and a deck 12 ft wide.

Who owns Prescott Drive over Johnson Gulch?

It is owned by the County Highway Agency.