US Bridges

Sycamore Drive over Silverado Canyon Creek

Fair

Orange County, California · 50 N/O Silverado Cyn RD · Structure no. 55C0189

Built
1957
68 years old
Condition
Fair
inspected April 2023
Type
Slab
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
100
2021 count
Owner
County
County Highway Agency

About this bridge

Sycamore Drive over Silverado Canyon Creek is a prestressed concrete slab carrying Sycamore Drive over Silverado Canyon Creek in Orange County, California. It was built in 1957, so it is 68 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 210 by 2041. The structure is 28 ft (8.5 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSycamore Drive
CrossesSilverado Canyon Creek
Location50 N/O Silverado Cyn RD
RouteCounty Highway 0
CountyOrange County
StateCalifornia
Coordinates33.7463, -117.62861
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic210 by 2041
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sycamore Drive over Silverado Canyon Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Sycamore Drive over Silverado Canyon 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 2023.

How much traffic does Sycamore Drive over Silverado Canyon Creek carry?

About 100 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Sycamore Drive over Silverado Canyon Creek?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 12 ft wide.

Who owns Sycamore Drive over Silverado Canyon Creek?

It is owned by the County Highway Agency.