US Bridges

Highland Valley RD over Sycamore Creek

Fair

San Diego County, California · 1.3MI E/O Pomerado RD · Structure no. 57C0583

Built
1983
42 years old
Condition
Fair
inspected October 2023
Type
Culvert
Steel
Length
32 ft
7 main spans
Daily traffic
4,500
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Highland Valley RD over Sycamore Creek is a steel culvert carrying Highland Valley RD over Sycamore Creek in San Diego County, California. It was built in 1983, so it is 42 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 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 4,500 vehicles a day, roughly 1% of them trucks, projected to reach 5,434 by 2045. The structure is 32 ft (9.8 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHighland Valley RD
CrossesSycamore Creek
Location1.3MI E/O Pomerado RD
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates33.05153, -117.04453
Functional classUrban 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans7
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span5 ft (1.5 m)
Deck width41 ft (12.5 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2016)
Projected traffic5,434 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Highland Valley RD over Sycamore Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Highland Valley RD over Sycamore 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 October 2023.

How much traffic does Highland Valley RD over Sycamore Creek carry?

About 4,500 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Highland Valley RD over Sycamore Creek?

The structure is 32 ft (9.8 m) long with a longest span of 5 ft (1.5 m) and a deck 41 ft wide.

Who owns Highland Valley RD over Sycamore Creek?

It is owned by the City or Municipal Highway Agency.