US Bridges

Azalea Ave over Fairfax Creek

Poor

Marin County, California · 80 Ft W of Arroyo RD · Structure no. 27C0142

Built
1930
95 years old
Condition
Poor
inspected September 2024
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
110
1981 count
Owner
City
City or Municipal Highway Agency

About this bridge

Azalea Ave over Fairfax Creek is a concrete tee beam carrying Azalea Ave over Fairfax Creek in Marin County, California. It was built in 1930, so it is 95 years old, older 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 110 vehicles a day, roughly 4% of them trucks, projected to reach 168 by 2044. The structure is 31 ft (9.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAzalea Ave
CrossesFairfax Creek
Location80 Ft W of Arroyo RD
RouteCity Street 0
Coordinates37.98858, -122.59322
Functional classUrban Local

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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width31 ft (9.3 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (1981)
Projected traffic168 by 2044
Trucks4%
Lanes on structure1
Traffic directionOne-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$336,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Azalea Ave over Fairfax Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Azalea Ave over Fairfax Creek 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 September 2024.

How much traffic does Azalea Ave over Fairfax Creek carry?

About 110 vehicles per day (1981 count), of which roughly 4% are trucks.

How long is Azalea Ave over Fairfax Creek?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 31 ft wide.

Who owns Azalea Ave over Fairfax Creek?

It is owned by the City or Municipal Highway Agency.