US Bridges

State Route 1 SB over Lake Drive

Fair

Monterey County, California · 05-MON-001-R85.51 · Structure no. 44 0212L

Built
1976
49 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
149 ft
1 main span
Daily traffic
23,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 SB over Lake Drive is a prestressed concrete box beam or girders - multiple carrying State Route 1 SB over Lake Drive in Monterey County, California. It was built in 1976, so it is 49 years old, younger 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 23,000 vehicles a day, roughly 4% of them trucks, projected to reach 26,943 by 2043. The structure is 149 ft (45.4 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesState Route 1 SB
CrossesLake Drive
Location05-MON-001-R85.51
RouteState Highway 1
CountyMonterey County
StateCalifornia
Coordinates36.68306, -121.80847
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating37.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length149 ft (45.4 m)
Longest span149 ft (45.4 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2009)
Projected traffic26,943 by 2043
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 1 SB over Lake Drive built?

It was built in 1976, making it 49 years old in 2025.

What condition is State Route 1 SB over Lake Drive 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 August 2023.

How much traffic does State Route 1 SB over Lake Drive carry?

About 23,000 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is State Route 1 SB over Lake Drive?

The structure is 149 ft (45.4 m) long with a longest span of 149 ft (45.4 m) and a deck 41 ft wide.

Who owns State Route 1 SB over Lake Drive?

It is owned by the State Highway Agency.