US Bridges

Main ST over Redwood Creek

Fair

San Mateo County, California · @ Veterans Blvd · Structure no. 35C0033

Built
1989
36 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
64 ft
2 main spans
Daily traffic
9,000
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main ST over Redwood Creek is a concrete continuous slab carrying Main ST over Redwood Creek in San Mateo County, California. It was built in 1989, so it is 36 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 9,000 vehicles a day, roughly 15% of them trucks, projected to reach 5,292 by 2042. The structure is 64 ft (19.4 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST
CrossesRedwood Creek
Location@ Veterans Blvd
RouteCity Street 0
CountySan Mateo County
StateCalifornia
Coordinates37.48941, -122.22642
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length64 ft (19.4 m)
Longest span31 ft (9.4 m)
Deck width70 ft (21.3 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,000 (2018)
Projected traffic5,292 by 2042
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Redwood Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Main ST over Redwood 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 April 2024.

How much traffic does Main ST over Redwood Creek carry?

About 9,000 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is Main ST over Redwood Creek?

The structure is 64 ft (19.4 m) long with a longest span of 31 ft (9.4 m) and a deck 70 ft wide.

Who owns Main ST over Redwood Creek?

It is owned by the City or Municipal Highway Agency.