US Bridges

Port Wine Ridge RD over Cedar Grove Ravine

Fair

Sierra County, California · 0.3 MI S Intx ST Louis RD · Structure no. 13C0052

Built
1975
50 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
25
2000 count
Owner
County
County Highway Agency

About this bridge

Port Wine Ridge RD over Cedar Grove Ravine is a steel stringer/multi-beam or girder carrying Port Wine Ridge RD over Cedar Grove Ravine in Sierra County, California. It was built in 1975, so it is 50 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 25 vehicles a day, roughly 15% of them trucks, projected to reach 52 by 2041. The structure is 28 ft (8.4 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesPort Wine Ridge RD
CrossesCedar Grove Ravine
Location0.3 MI S Intx ST Louis RD
RouteCounty Highway 0
CountySierra County
StateCalifornia
Coordinates39.69243, -120.9279
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.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length28 ft (8.4 m)
Longest span25 ft (7.6 m)
Deck width16 ft (5 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2000)
Projected traffic52 by 2041
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Port Wine Ridge RD over Cedar Grove Ravine built?

It was built in 1975, making it 50 years old in 2025.

What condition is Port Wine Ridge RD over Cedar Grove Ravine 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 August 2023.

How much traffic does Port Wine Ridge RD over Cedar Grove Ravine carry?

About 25 vehicles per day (2000 count), of which roughly 15% are trucks.

How long is Port Wine Ridge RD over Cedar Grove Ravine?

The structure is 28 ft (8.4 m) long with a longest span of 25 ft (7.6 m) and a deck 16 ft wide.

Who owns Port Wine Ridge RD over Cedar Grove Ravine?

It is owned by the County Highway Agency.