US Bridges

Norfolk ST over 16th Ave Channel

Fair

San Mateo County, California · South of Lodi Ave · Structure no. 35C0067

Built
1953
72 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
5,590
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

Norfolk ST over 16th Ave Channel is a concrete continuous culvert carrying Norfolk ST over 16th Ave Channel in San Mateo County, California. It was built in 1953, so it is 72 years old, older 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 6 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 5,590 vehicles a day, roughly 3% of them trucks, projected to reach 7,334 by 2041. The structure is 29 ft (8.8 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNorfolk ST
Crosses16th Ave Channel
LocationSouth of Lodi Ave
RouteCity Street 0
CountySan Mateo County
StateCalifornia
Coordinates37.56176, -122.29932
Functional classUrban Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width59 ft (17.9 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,590 (2011)
Projected traffic7,334 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Norfolk ST over 16th Ave Channel built?

It was built in 1953, making it 72 years old in 2025.

What condition is Norfolk ST over 16th Ave Channel 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 2023.

How much traffic does Norfolk ST over 16th Ave Channel carry?

About 5,590 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is Norfolk ST over 16th Ave Channel?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m) and a deck 59 ft wide.

Who owns Norfolk ST over 16th Ave Channel?

It is owned by the City or Municipal Highway Agency.