US Bridges

Airport Blvd over Burlingame Lagoon

Poor

San Mateo County, California · 1.3 MI E of Bayshore HWY · Structure no. 35C0086

Built
1970
55 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
116 ft
4 main spans
Daily traffic
7,000
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Airport Blvd over Burlingame Lagoon is a prestressed concrete continuous stringer/multi-beam or girder carrying Airport Blvd over Burlingame Lagoon in San Mateo County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,000 vehicles a day, roughly 15% of them trucks, projected to reach 10,904 by 2041. The structure is 116 ft (35.4 m) long and 59 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesAirport Blvd
CrossesBurlingame Lagoon
Location1.3 MI E of Bayshore HWY
RouteCity Street 0
Coordinates37.59089, -122.33843
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
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 rating21.1 US tons
Inventory rating12.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span51 ft (15.5 m)
Deck width59 ft (17.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2019)
Projected traffic10,904 by 2041
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Airport Blvd over Burlingame Lagoon built?

It was built in 1970, making it 55 years old in 2025.

What condition is Airport Blvd over Burlingame Lagoon in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Airport Blvd over Burlingame Lagoon carry?

About 7,000 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Airport Blvd over Burlingame Lagoon?

The structure is 116 ft (35.4 m) long with a longest span of 51 ft (15.5 m) and a deck 59 ft wide.

Who owns Airport Blvd over Burlingame Lagoon?

It is owned by the City or Municipal Highway Agency.