US Bridges

Crystal Springs RD over San Mateo Creek

Fair

San Mateo County, California · 0.4 MI N Tartan Trails RD · Structure no. 35C0037

Built
1904
121 years old
Condition
Fair
inspected May 2023
Type
Arch - Deck
Concrete
Length
40 ft
1 main span
Daily traffic
10,000
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Crystal Springs RD over San Mateo Creek is a concrete arch - deck carrying Crystal Springs RD over San Mateo Creek in San Mateo County, California. It was built in 1904, so it is 121 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 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 10,000 vehicles a day, roughly 1% of them trucks, projected to reach 11,757 by 2040. The structure is 40 ft (12.2 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCrystal Springs RD
CrossesSan Mateo Creek
Location0.4 MI N Tartan Trails RD
RouteCity Street 0
CountySan Mateo County
StateCalifornia
Coordinates37.54194, -122.3491
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.9 US tons
Inventory rating16.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2019)
Projected traffic11,757 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Crystal Springs RD over San Mateo Creek built?

It was built in 1904, making it 121 years old in 2025.

What condition is Crystal Springs RD over San Mateo 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 May 2023.

How much traffic does Crystal Springs RD over San Mateo Creek carry?

About 10,000 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Crystal Springs RD over San Mateo Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 21 ft wide.

Who owns Crystal Springs RD over San Mateo Creek?

It is owned by the City or Municipal Highway Agency.