US Bridges

Redwood HWY over Gallinas Creek

Good

Marin County, California · In San Rafael · Structure no. 27C0082

Built
1969
56 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
48 ft
3 main spans
Daily traffic
16,000
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

Redwood HWY over Gallinas Creek is a concrete continuous culvert carrying Redwood HWY over Gallinas Creek in Marin County, California. It was built in 1969, so it is 56 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 16,000 vehicles a day, roughly 10% of them trucks, projected to reach 18,936 by 2045. The structure is 48 ft (14.6 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRedwood HWY
CrossesGallinas Creek
LocationIn San Rafael
RouteCity Street 0
Coordinates38.01209, -122.54127
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span16 ft (4.9 m)
Deck width55 ft (16.8 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2012)
Projected traffic18,936 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Redwood HWY over Gallinas Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Redwood HWY over Gallinas 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 August 2023.

How much traffic does Redwood HWY over Gallinas Creek carry?

About 16,000 vehicles per day (2012 count), of which roughly 10% are trucks.

How long is Redwood HWY over Gallinas Creek?

The structure is 48 ft (14.6 m) long with a longest span of 16 ft (4.9 m) and a deck 55 ft wide.

Who owns Redwood HWY over Gallinas Creek?

It is owned by the City or Municipal Highway Agency.