US Bridges

Boronda RD over Main Canal

Fair

Monterey County, California · 0.3 MI N of SH 183 · Structure no. 44C0067

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
47 ft
2 main spans
Daily traffic
2,800
2017 count
Owner
County
County Highway Agency

About this bridge

Boronda RD over Main Canal is a concrete continuous slab carrying Boronda RD over Main Canal in Monterey County, California. It was built in 1960, so it is 65 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,800 vehicles a day, roughly 10% of them trucks, projected to reach 4,881 by 2040. The structure is 47 ft (14.4 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesBoronda RD
CrossesMain Canal
Location0.3 MI N of SH 183
RouteCounty Highway 0
CountyMonterey County
StateCalifornia
Coordinates36.6903, -121.68058
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length47 ft (14.4 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2017)
Projected traffic4,881 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Boronda RD over Main Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is Boronda RD over Main Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Boronda RD over Main Canal carry?

About 2,800 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is Boronda RD over Main Canal?

The structure is 47 ft (14.4 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns Boronda RD over Main Canal?

It is owned by the County Highway Agency.