US Bridges

Gilbert ST over Brea Creek Channel

Fair

Orange County, California · 100 S/O Malvern Ave · Structure no. 55C0289

Built
1957
68 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
72 ft
2 main spans
Daily traffic
39,400
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gilbert ST over Brea Creek Channel is a concrete continuous slab carrying Gilbert ST over Brea Creek Channel 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 39,400 vehicles a day, roughly 1% of them trucks, projected to reach 52,700 by 2041. The structure is 72 ft (21.9 m) long and 68 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGilbert ST
CrossesBrea Creek Channel
Location100 S/O Malvern Ave
RouteCity Street 0
CountyOrange County
StateCalifornia
Coordinates33.87758, -117.96729
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span35 ft (10.7 m)
Deck width68 ft (20.7 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,400 (2017)
Projected traffic52,700 by 2041
Trucks1%
Lanes on structure6
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Gilbert ST over Brea Creek Channel built?

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

What condition is Gilbert ST over Brea Creek 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 September 2023.

How much traffic does Gilbert ST over Brea Creek Channel carry?

About 39,400 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Gilbert ST over Brea Creek Channel?

The structure is 72 ft (21.9 m) long with a longest span of 35 ft (10.7 m) and a deck 68 ft wide.

Who owns Gilbert ST over Brea Creek Channel?

It is owned by the City or Municipal Highway Agency.