US Bridges

Lindaro ST over Mahon Creek

Good

Marin County, California · South of Andersen DR · Structure no. 27C0076

Built
1962
63 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
5,735
1977 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lindaro ST over Mahon Creek is a concrete continuous culvert carrying Lindaro ST over Mahon Creek in Marin County, California. It was built in 1962, so it is 63 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 5,735 vehicles a day, roughly 10% of them trucks, projected to reach 12,195 by 2041. The structure is 26 ft (7.9 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLindaro ST
CrossesMahon Creek
LocationSouth of Andersen DR
RouteCity Street 0
Coordinates37.96787, -122.52646
Functional classUrban Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width62 ft (18.8 m)
Roadway width46 ft (14.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,735 (1977)
Projected traffic12,195 by 2041
Trucks10%
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 Lindaro ST over Mahon Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Lindaro ST over Mahon Creek 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 July 2023.

How much traffic does Lindaro ST over Mahon Creek carry?

About 5,735 vehicles per day (1977 count), of which roughly 10% are trucks.

How long is Lindaro ST over Mahon Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 62 ft wide.

Who owns Lindaro ST over Mahon Creek?

It is owned by the City or Municipal Highway Agency.