US Bridges

Interstate 80 over Mystic Road

Fair

Nevada County, California · 03-NEV-080-29.49 · Structure no. 17 0064

Built
1958
67 years old
Condition
Fair
inspected August 2024
Type
Frame
Concrete
Length
31 ft
1 main span
Daily traffic
27,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 80 over Mystic Road is a concrete frame carrying Interstate 80 over Mystic Road in Nevada County, California. It was built in 1958, so it is 67 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 27,000 vehicles a day, roughly 16% of them trucks, projected to reach 42,150 by 2041. The structure is 31 ft (9.4 m) long and 79 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesInterstate 80
CrossesMystic Road
Location03-NEV-080-29.49
RouteInterstate 80
CountyNevada County
StateCalifornia
Coordinates39.42234, -120.03517
Functional classRural Principal Arterial - Interstate

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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width79 ft (24.1 m)
Roadway width75 ft (22.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,000 (2020)
Projected traffic42,150 by 2041
Trucks16%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed52.2 mi (84 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 80 over Mystic Road built?

It was built in 1958, making it 67 years old in 2025.

What condition is Interstate 80 over Mystic Road 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 Interstate 80 over Mystic Road carry?

About 27,000 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is Interstate 80 over Mystic Road?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 79 ft wide.

Who owns Interstate 80 over Mystic Road?

It is owned by the State Highway Agency.