US Bridges

Auburn Folsom RD over Miners Ravine

Fair

Placer County, California · 1.1 MI N Douglas Blvd · Structure no. 19C0051

Built
1930
95 years old, rebuilt 1981
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
17,248
2010 count
Owner
County
County Highway Agency

About this bridge

Auburn Folsom RD over Miners Ravine is a concrete tee beam carrying Auburn Folsom RD over Miners Ravine in Placer County, California. It was built in 1930 and reconstructed in 1981, so it is 95 years old, older 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 17,248 vehicles a day, roughly 5% of them trucks, projected to reach 20,471 by 2044. The structure is 32 ft (9.8 m) long and 44 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesAuburn Folsom RD
CrossesMiners Ravine
Location1.1 MI N Douglas Blvd
RouteCounty Highway 0
CountyPlacer County
StateCalifornia
Coordinates38.75739, -121.16393
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,248 (2010)
Projected traffic20,471 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Auburn Folsom RD over Miners Ravine built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1981.

What condition is Auburn Folsom RD over Miners 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 June 2024.

How much traffic does Auburn Folsom RD over Miners Ravine carry?

About 17,248 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Auburn Folsom RD over Miners Ravine?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns Auburn Folsom RD over Miners Ravine?

It is owned by the County Highway Agency.