US Bridges

Mountain Avenue over North Norco Channel

Good

Riverside County, California · 0.2 MI N/O Second Street · Structure no. 56C0300

Built
1979
46 years old
Condition
Good
inspected March 2023
Type
Slab
Concrete
Length
35 ft
1 main span
Daily traffic
2,753
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mountain Avenue over North Norco Channel is a concrete slab carrying Mountain Avenue over North Norco Channel in Riverside County, California. It was built in 1979, so it is 46 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 2,753 vehicles a day, roughly 1% of them trucks, projected to reach 4,204 by 2040. The structure is 35 ft (10.6 m) long and 60 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMountain Avenue
CrossesNorth Norco Channel
Location0.2 MI N/O Second Street
RouteCity Street 0
CountyRiverside County
StateCalifornia
Coordinates33.91139, -117.56676
Functional classUrban Local

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 protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating66 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length35 ft (10.6 m)
Longest span33 ft (10.2 m)
Deck width60 ft (18.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,753 (2018)
Projected traffic4,204 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Mountain Avenue over North Norco Channel built?

It was built in 1979, making it 46 years old in 2025.

What condition is Mountain Avenue over North Norco Channel 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 March 2023.

How much traffic does Mountain Avenue over North Norco Channel carry?

About 2,753 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Mountain Avenue over North Norco Channel?

The structure is 35 ft (10.6 m) long with a longest span of 33 ft (10.2 m) and a deck 60 ft wide.

Who owns Mountain Avenue over North Norco Channel?

It is owned by the City or Municipal Highway Agency.