US Bridges

Laguna Road over Mugu Lagoon

Fair

Ventura County, California · Nbvc Point Mugu · Structure no. 1CA070A

Built
1949
76 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
30 ft
5 main spans
Daily traffic
200
2013 count
Owner
Federal
Navy / Marines

About this bridge

Laguna Road over Mugu Lagoon is a concrete culvert carrying Laguna Road over Mugu Lagoon in Ventura County, California. It was built in 1949, so it is 76 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 6 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 200 vehicles a day, roughly 2% of them trucks, projected to reach 250 by 2032. The structure is 30 ft (9.2 m) long and 64 ft wide.

Location

Open in Google Maps
CarriesLaguna Road
CrossesMugu Lagoon
LocationNbvc Point Mugu
RouteFederal Lands Road 0
CountyVentura County
StateCalifornia
Coordinates34.10239, -119.10411
Functional classRural 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 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 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 rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length30 ft (9.2 m)
Longest span6 ft (1.8 m)
Deck width64 ft (19.5 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2013)
Projected traffic250 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$54,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Laguna Road over Mugu Lagoon built?

It was built in 1949, making it 76 years old in 2025.

What condition is Laguna Road over Mugu Lagoon 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 Laguna Road over Mugu Lagoon carry?

About 200 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is Laguna Road over Mugu Lagoon?

The structure is 30 ft (9.2 m) long with a longest span of 6 ft (1.8 m) and a deck 64 ft wide.

Who owns Laguna Road over Mugu Lagoon?

It is owned by the Navy / Marines.