US Bridges

Washington ST over State Route 20

Good

Nevada County, California · 03-NEV-020-R17.18-NEVC · Structure no. 17 0056

Built
1967
58 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
7,500
2020 count
Owner
State
State Highway Agency

About this bridge

Washington ST over State Route 20 is a prestressed concrete box beam or girders - multiple carrying Washington ST over State Route 20 in Nevada County, California. It was built in 1967, so it is 58 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,500 vehicles a day, roughly 10% of them trucks, projected to reach 19,254 by 2042. The structure is 108 ft (32.8 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWashington ST
CrossesState Route 20
Location03-NEV-020-R17.18-NEVC
RouteCity Street 0
Coordinates39.26474, -121.01689
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating32.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length108 ft (32.8 m)
Longest span103 ft (31.4 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2020)
Projected traffic19,254 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Washington ST over State Route 20 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Washington ST over State Route 20 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Washington ST over State Route 20 carry?

About 7,500 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Washington ST over State Route 20?

The structure is 108 ft (32.8 m) long with a longest span of 103 ft (31.4 m) and a deck 40 ft wide.

Who owns Washington ST over State Route 20?

It is owned by the State Highway Agency.