US Bridges

Simpson Ave over 2nd San Diego Aqua Canal

Good

Riverside County, California · 0.8 M W/O Warren Rd. · Structure no. 56C0647

Built
1958
67 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
8,000
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Simpson Ave over 2nd San Diego Aqua Canal is a concrete continuous culvert carrying Simpson Ave over 2nd San Diego Aqua Canal in Riverside County, California. It was built in 1958, so it is 67 years old, older 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 8,000 vehicles a day, roughly 5% of them trucks, projected to reach 14,000 by 2040. The structure is 28 ft (8.5 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSimpson Ave
Crosses2nd San Diego Aqua Canal
Location0.8 M W/O Warren Rd.
RouteCity Street 0
Coordinates33.70753, -117.04603
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span12 ft (3.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2021)
Projected traffic14,000 by 2040
Trucks5%
Lanes on structure2
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 Simpson Ave over 2nd San Diego Aqua Canal built?

It was built in 1958, making it 67 years old in 2025.

What condition is Simpson Ave over 2nd San Diego Aqua Canal 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 Simpson Ave over 2nd San Diego Aqua Canal carry?

About 8,000 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Simpson Ave over 2nd San Diego Aqua Canal?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.8 m) and a deck 26 ft wide.

Who owns Simpson Ave over 2nd San Diego Aqua Canal?

It is owned by the City or Municipal Highway Agency.