US Bridges

Mariposa Road over Oro Grande Wash

Good

San Bernardino County, California · 0.25 MI N/O Nisqualli RD · Structure no. 54C0782

Built
2013
12 years old
Condition
Good
inspected February 2022
Type
Culvert
Concrete
Length
33 ft
2 main spans
Daily traffic
4,000
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mariposa Road over Oro Grande Wash is a concrete culvert carrying Mariposa Road over Oro Grande Wash in San Bernardino County, California. It was built in 2013, so it is 12 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 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 5,309 by 2044. The structure is 33 ft (10.2 m) long. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesMariposa Road
CrossesOro Grande Wash
Location0.25 MI N/O Nisqualli RD
RouteCity Street 0
CountySan Bernardino County
StateCalifornia
Coordinates34.48919, -117.33164
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length33 ft (10.2 m)
Longest span16 ft (5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2016)
Projected traffic5,309 by 2044
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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 Mariposa Road over Oro Grande Wash built?

It was built in 2013, making it 12 years old in 2025.

What condition is Mariposa Road over Oro Grande Wash 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 February 2022.

How much traffic does Mariposa Road over Oro Grande Wash carry?

About 4,000 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is Mariposa Road over Oro Grande Wash?

The structure is 33 ft (10.2 m) long with a longest span of 16 ft (5 m).

Who owns Mariposa Road over Oro Grande Wash?

It is owned by the City or Municipal Highway Agency.