US Bridges

Southern Heights B over Hillside

Good

Marin County, California · JCT Meyer Road · Structure no. 27C0167

Built
2021
4 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete Continuous
Length
129 ft
3 main spans
Daily traffic
100
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Southern Heights B over Hillside is a concrete continuous slab carrying Southern Heights B over Hillside in Marin County, California. It was built in 2021, so it is 4 years old, younger 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 130 by 2042. The structure is 129 ft (39.4 m) long and 12 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSouthern Heights B
CrossesHillside
LocationJCT Meyer Road
RouteCity Street 0
Coordinates37.96223, -122.52895
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length129 ft (39.4 m)
Longest span43 ft (13 m)
Deck width12 ft (3.8 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic130 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesOther
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township 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 Southern Heights B over Hillside built?

It was built in 2021, making it 4 years old in 2025.

What condition is Southern Heights B over Hillside 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 Southern Heights B over Hillside carry?

About 100 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Southern Heights B over Hillside?

The structure is 129 ft (39.4 m) long with a longest span of 43 ft (13 m) and a deck 12 ft wide.

Who owns Southern Heights B over Hillside?

It is owned by the Town or Township Highway Agency and maintained by the City or Municipal Highway Agency.