US Bridges

Jack of Hearts Roa over Dark Canyon Crk

Fair

Mendocino County, California · 14.2 MI NE of Dehaven · Structure no. 000000000L67860

Built
1985
40 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
50
2022 count
Owner
Federal
Bureau of Land Management

About this bridge

Jack of Hearts Roa over Dark Canyon Crk is a steel stringer/multi-beam or girder carrying Jack of Hearts Roa over Dark Canyon Crk in Mendocino County, California. It was built in 1985, so it is 40 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2040. The structure is 51 ft (15.5 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesJack of Hearts Roa
CrossesDark Canyon Crk
Location14.2 MI NE of Dehaven
CountyMendocino County
StateCalifornia
Coordinates39.72799, -123.66293
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span48 ft (14.6 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2040
Trucks10%
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

OwnerBureau of Land Management
Maintained byBureau of Land Management
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$21,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jack of Hearts Roa over Dark Canyon Crk built?

It was built in 1985, making it 40 years old in 2025.

What condition is Jack of Hearts Roa over Dark Canyon Crk 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 December 2024.

How much traffic does Jack of Hearts Roa over Dark Canyon Crk carry?

About 50 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Jack of Hearts Roa over Dark Canyon Crk?

The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 16 ft wide.

Who owns Jack of Hearts Roa over Dark Canyon Crk?

It is owned by the Bureau of Land Management.