US Bridges

State Route 1 over Bixby Creek

Fair

Monterey County, California · 05-MON-001-59.37 · Structure no. 44 0019

Built
1932
93 years old, rebuilt 2000
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete Continuous
Length
714 ft
1 main span
Daily traffic
4,300
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Bixby Creek is a concrete continuous arch - deck carrying State Route 1 over Bixby Creek in Monterey County, California. It was built in 1932 and reconstructed in 2000, so it is 93 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 4,300 vehicles a day, projected to reach 3,188 by 2043. The structure is 714 ft (217.6 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesBixby Creek
Location05-MON-001-59.37
RouteState Highway 1
CountyMonterey County
StateCalifornia
Coordinates36.37064, -121.9016
Functional classRural Minor Arterial

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.
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadH 15
Structure length714 ft (217.6 m)
Longest span330 ft (100.6 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2009)
Projected traffic3,188 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

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

Frequently asked questions

When was State Route 1 over Bixby Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2000.

What condition is State Route 1 over Bixby Creek 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 2023.

How much traffic does State Route 1 over Bixby Creek carry?

About 4,300 vehicles per day (2009 count).

How long is State Route 1 over Bixby Creek?

The structure is 714 ft (217.6 m) long with a longest span of 330 ft (100.6 m) and a deck 28 ft wide.

Who owns State Route 1 over Bixby Creek?

It is owned by the State Highway Agency.