US Bridges

Donner Pass RD over Soda Springs Creek

Fair

Nevada County, California · 0.5 MI E Soda Springs RD · Structure no. 17C0051

Built
1924
101 years old, rebuilt 1937
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
552
2016 count
Owner
County
County Highway Agency

About this bridge

Donner Pass RD over Soda Springs Creek is a concrete tee beam carrying Donner Pass RD over Soda Springs Creek in Nevada County, California. It was built in 1924 and reconstructed in 1937, so it is 101 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 552 vehicles a day, roughly 10% of them trucks, projected to reach 887 by 2046. The structure is 31 ft (9.3 m) long and 46 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesDonner Pass RD
CrossesSoda Springs Creek
Location0.5 MI E Soda Springs RD
RouteCounty Highway 0
Coordinates39.32396, -120.37116
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length31 ft (9.3 m)
Longest span30 ft (9 m)
Deck width46 ft (14.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic552 (2016)
Projected traffic887 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Donner Pass RD over Soda Springs Creek built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1937.

What condition is Donner Pass RD over Soda Springs Creek 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 2024.

How much traffic does Donner Pass RD over Soda Springs Creek carry?

About 552 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is Donner Pass RD over Soda Springs Creek?

The structure is 31 ft (9.3 m) long with a longest span of 30 ft (9 m) and a deck 46 ft wide.

Who owns Donner Pass RD over Soda Springs Creek?

It is owned by the County Highway Agency.