US Bridges

Kerner Blvd over Indst Prk Drainage Canal

Poor

Marin County, California · N/O Irene ST S/O Bellam · Structure no. 27C0173

Built
1972
53 years old
Condition
Poor
inspected July 2023
Type
Slab
Concrete
Length
45 ft
1 main span
Daily traffic
3,600
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Kerner Blvd over Indst Prk Drainage Canal is a concrete slab carrying Kerner Blvd over Indst Prk Drainage Canal in Marin County, California. It was built in 1972, so it is 53 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 3,600 vehicles a day, roughly 2% of them trucks, projected to reach 4,700 by 2042. The structure is 45 ft (13.6 m) long and 71 ft wide.

Location

Open in Google Maps
CarriesKerner Blvd
CrossesIndst Prk Drainage Canal
LocationN/O Irene ST S/O Bellam
RouteCity Street 0
CountyMarin County
StateCalifornia
Coordinates37.95965, -122.50173
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating20.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length45 ft (13.6 m)
Longest span41 ft (12.5 m)
Deck width71 ft (21.5 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2023)
Projected traffic4,700 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Kerner Blvd over Indst Prk Drainage Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is Kerner Blvd over Indst Prk Drainage Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does Kerner Blvd over Indst Prk Drainage Canal carry?

About 3,600 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Kerner Blvd over Indst Prk Drainage Canal?

The structure is 45 ft (13.6 m) long with a longest span of 41 ft (12.5 m) and a deck 71 ft wide.

Who owns Kerner Blvd over Indst Prk Drainage Canal?

It is owned by the City or Municipal Highway Agency.