US Bridges

SR 92 EB & Ramps over U.S. 101 Marina Lagoon

Good

San Mateo County, California · 04-SM-092-R11.78-SM · Structure no. 35 0252R

Built
1971
54 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
4,362 ft
95 main spans
Daily traffic
55,500
2022 count
Owner
State
State Highway Agency

About this bridge

SR 92 EB & Ramps over U.S. 101 Marina Lagoon is a prestressed concrete continuous box beam or girders - multiple carrying SR 92 EB & Ramps over U.S. 101 Marina Lagoon in San Mateo County, California. It was built in 1971, so it is 54 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 55,500 vehicles a day, roughly 5% of them trucks, projected to reach 86,931 by 2045. The structure is 4,362 ft (1,329.5 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSR 92 EB & Ramps
CrossesU.S. 101 Marina Lagoon
Location04-SM-092-R11.78-SM
RouteState Highway 92
Coordinates37.55246, -122.30239
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans95
Design loadHS 20 + Mod
Structure length4,362 ft (1,329.5 m)
Longest span208 ft (63.4 m)
Deck width42 ft (12.7 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic55,500 (2022)
Projected traffic86,931 by 2045
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.7 mi (6 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 SR 92 EB & Ramps over U.S. 101 Marina Lagoon built?

It was built in 1971, making it 54 years old in 2025.

What condition is SR 92 EB & Ramps over U.S. 101 Marina Lagoon 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 August 2024.

How much traffic does SR 92 EB & Ramps over U.S. 101 Marina Lagoon carry?

About 55,500 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is SR 92 EB & Ramps over U.S. 101 Marina Lagoon?

The structure is 4,362 ft (1,329.5 m) long with a longest span of 208 ft (63.4 m) and a deck 42 ft wide.

Who owns SR 92 EB & Ramps over U.S. 101 Marina Lagoon?

It is owned by the State Highway Agency.