US Bridges

State Route 51 NB over State Route 160 NB

Fair

Sacramento County, California · 03-SAC-051-3.63-SAC · Structure no. 24 0130R

Built
1954
71 years old, rebuilt 1980
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
331 ft
4 main spans
Daily traffic
100,000
2010 count
Owner
State
State Highway Agency

About this bridge

State Route 51 NB over State Route 160 NB is a concrete continuous box beam or girders - multiple carrying State Route 51 NB over State Route 160 NB in Sacramento County, California. It was built in 1954 and reconstructed in 1980, so it is 71 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 100,000 vehicles a day, roughly 6% of them trucks, projected to reach 127,024 by 2045. The structure is 331 ft (100.9 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesState Route 51 NB
CrossesState Route 160 NB
Location03-SAC-051-3.63-SAC
RouteState Highway 51
CountySacramento County
StateCalifornia
Coordinates38.59989, -121.44007
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
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 rating41.1 US tons
Inventory rating26.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length331 ft (100.9 m)
Longest span130 ft (39.6 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100,000 (2010)
Projected traffic127,024 by 2045
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 51 NB over State Route 160 NB built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1980.

What condition is State Route 51 NB over State Route 160 NB 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 November 2023.

How much traffic does State Route 51 NB over State Route 160 NB carry?

About 100,000 vehicles per day (2010 count), of which roughly 6% are trucks.

How long is State Route 51 NB over State Route 160 NB?

The structure is 331 ft (100.9 m) long with a longest span of 130 ft (39.6 m) and a deck 40 ft wide.

Who owns State Route 51 NB over State Route 160 NB?

It is owned by the State Highway Agency.