US Bridges

State Route 99 NB over Beardsley Canal

Fair

Kern County, California · 06-KER-099-R28.39 · Structure no. 50 0050R

Built
1964
61 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
131 ft
1 main span
Daily traffic
55,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 99 NB over Beardsley Canal is a prestressed concrete stringer/multi-beam or girder carrying State Route 99 NB over Beardsley Canal in Kern County, California. It was built in 1964, so it is 61 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 55,000 vehicles a day, roughly 28% of them trucks, projected to reach 80,345 by 2045. The structure is 131 ft (40 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesState Route 99 NB
CrossesBeardsley Canal
Location06-KER-099-R28.39
RouteState Highway 99
Coordinates35.41845, -119.05999
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating27.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length131 ft (40 m)
Longest span69 ft (21 m)
Deck width52 ft (15.8 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,000 (2019)
Projected traffic80,345 by 2045
Trucks28%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 99 NB over Beardsley Canal built?

It was built in 1964, making it 61 years old in 2025.

What condition is State Route 99 NB over Beardsley Canal 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 October 2023.

How much traffic does State Route 99 NB over Beardsley Canal carry?

About 55,000 vehicles per day (2019 count), of which roughly 28% are trucks.

How long is State Route 99 NB over Beardsley Canal?

The structure is 131 ft (40 m) long with a longest span of 69 ft (21 m) and a deck 52 ft wide.

Who owns State Route 99 NB over Beardsley Canal?

It is owned by the State Highway Agency.