US Bridges

State Route 1 over Oceanside Bluff

Good

Mendocino County, California · 01-MEN-001-82.05 · Structure no. 10 0295

Built
1999
26 years old
Condition
Good
inspected September 2021
Type
Slab
Prestressed Concrete Continuous
Length
197 ft
3 main spans
Daily traffic
1,185
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Oceanside Bluff is a prestressed concrete continuous slab carrying State Route 1 over Oceanside Bluff in Mendocino County, California. It was built in 1999, so it is 26 years old, younger 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 1,185 vehicles a day, roughly 3% of them trucks, projected to reach 1,020 by 2041. The structure is 197 ft (60 m) long and 35 ft wide. If it were closed, the detour would be 60.9 mi (98 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesOceanside Bluff
Location01-MEN-001-82.05
RouteState Highway 1
CountyMendocino County
StateCalifornia
Coordinates39.69342, -123.79699
Functional classRural Minor Arterial

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 inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length197 ft (60 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,185 (2009)
Projected traffic1,020 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed60.9 mi (98 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 State Route 1 over Oceanside Bluff built?

It was built in 1999, making it 26 years old in 2025.

What condition is State Route 1 over Oceanside Bluff 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 September 2021.

How much traffic does State Route 1 over Oceanside Bluff carry?

About 1,185 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is State Route 1 over Oceanside Bluff?

The structure is 197 ft (60 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns State Route 1 over Oceanside Bluff?

It is owned by the State Highway Agency.