US Bridges

Utah Ave over Colma Creek

Good

San Mateo County, California · 0.2 MI E of S Airport Blv · Structure no. 35C0101

Built
1975
50 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
155 ft
4 main spans
Daily traffic
12,150
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Utah Ave over Colma Creek is a concrete continuous slab carrying Utah Ave over Colma Creek in San Mateo County, California. It was built in 1975, so it is 50 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 12,150 vehicles a day, roughly 12% of them trucks, projected to reach 9,620 by 2043. The structure is 155 ft (47.2 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUtah Ave
CrossesColma Creek
Location0.2 MI E of S Airport Blv
RouteCity Street 0
Coordinates37.64613, -122.40137
Functional classUrban Collector

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 protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span43 ft (13.1 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,150 (2010)
Projected traffic9,620 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Utah Ave over Colma Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Utah Ave over Colma Creek 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 April 2023.

How much traffic does Utah Ave over Colma Creek carry?

About 12,150 vehicles per day (2010 count), of which roughly 12% are trucks.

How long is Utah Ave over Colma Creek?

The structure is 155 ft (47.2 m) long with a longest span of 43 ft (13.1 m) and a deck 76 ft wide.

Who owns Utah Ave over Colma Creek?

It is owned by the City or Municipal Highway Agency.