US Bridges

Base Line RD over Cucamonga Creek Channel

Good

San Bernardino County, California · 0.3 MI W of Carnelian · Structure no. 54C0222

Built
1973
52 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
154 ft
3 main spans
Daily traffic
15,052
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Base Line RD over Cucamonga Creek Channel is a concrete continuous tee beam carrying Base Line RD over Cucamonga Creek Channel in San Bernardino County, California. It was built in 1973, so it is 52 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 15,052 vehicles a day, roughly 5% of them trucks, projected to reach 20,320 by 2043. The structure is 154 ft (46.9 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBase Line RD
CrossesCucamonga Creek Channel
Location0.3 MI W of Carnelian
RouteCity Street 0
Coordinates34.12147, -117.62032
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 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 rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span56 ft (17.1 m)
Deck width84 ft (25.6 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,052 (2019)
Projected traffic20,320 by 2043
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Base Line RD over Cucamonga Creek Channel built?

It was built in 1973, making it 52 years old in 2025.

What condition is Base Line RD over Cucamonga Creek 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 October 2024.

How much traffic does Base Line RD over Cucamonga Creek Channel carry?

About 15,052 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Base Line RD over Cucamonga Creek Channel?

The structure is 154 ft (46.9 m) long with a longest span of 56 ft (17.1 m) and a deck 84 ft wide.

Who owns Base Line RD over Cucamonga Creek Channel?

It is owned by the City or Municipal Highway Agency.