US Bridges

Main ST over Washington Channel

Good

San Diego County, California · 0.15MI E/O Magnolia Ave · Structure no. 57C0265

Built
1959
66 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
13,300
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main ST over Washington Channel is a concrete culvert carrying Main ST over Washington Channel in San Diego County, California. It was built in 1959, so it is 66 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 13,300 vehicles a day, roughly 1% of them trucks, projected to reach 27,350 by 2042. The structure is 27 ft (8.2 m) long and 99 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMain ST
CrossesWashington Channel
Location0.15MI E/O Magnolia Ave
RouteCity Street 0
Coordinates32.79483, -116.95944
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
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
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span10 ft (3 m)
Deck width99 ft (30.1 m)
Roadway width78 ft (23.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,300 (2016)
Projected traffic27,350 by 2042
Trucks1%
Lanes on structure2
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 Main ST over Washington Channel built?

It was built in 1959, making it 66 years old in 2025.

What condition is Main ST over Washington 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 September 2023.

How much traffic does Main ST over Washington Channel carry?

About 13,300 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Main ST over Washington Channel?

The structure is 27 ft (8.2 m) long with a longest span of 10 ft (3 m) and a deck 99 ft wide.

Who owns Main ST over Washington Channel?

It is owned by the City or Municipal Highway Agency.