US Bridges

State Route 20 over Bennett Street

Fair

Nevada County, California · 03-NEV-020-R13.11-GVY · Structure no. 17 0052

Built
1969
56 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
139 ft
3 main spans
Daily traffic
34,500
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 20 over Bennett Street is a concrete continuous box beam or girders - multiple carrying State Route 20 over Bennett Street in Nevada County, California. It was built in 1969, so it is 56 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 6 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 34,500 vehicles a day, projected to reach 81,555 by 2041. The structure is 139 ft (42.4 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 20
CrossesBennett Street
Location03-NEV-020-R13.11-GVY
RouteState Highway 20
Coordinates39.21857, -121.05864
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating23.6 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span70 ft (21.3 m)
Deck width76 ft (23.2 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,500 (2020)
Projected traffic81,555 by 2041
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 State Route 20 over Bennett Street built?

It was built in 1969, making it 56 years old in 2025.

What condition is State Route 20 over Bennett Street 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 July 2024.

How much traffic does State Route 20 over Bennett Street carry?

About 34,500 vehicles per day (2020 count).

How long is State Route 20 over Bennett Street?

The structure is 139 ft (42.4 m) long with a longest span of 70 ft (21.3 m) and a deck 76 ft wide.

Who owns State Route 20 over Bennett Street?

It is owned by the State Highway Agency.