US Bridges

E Washington ST over US Highway 101

Fair

Sonoma County, California · 04-SON-101-4.76-PET · Structure no. 20 0246

Built
1975
50 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
250 ft
2 main spans
Daily traffic
20,000
2010 count
Owner
State
State Highway Agency

About this bridge

E Washington ST over US Highway 101 is a prestressed concrete continuous box beam or girders - multiple carrying E Washington ST over US Highway 101 in Sonoma County, California. It was built in 1975, so it is 50 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20,000 vehicles a day, roughly 10% of them trucks, projected to reach 28,182 by 2046. The structure is 250 ft (76.2 m) long and 84 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesE Washington ST
CrossesUS Highway 101
Location04-SON-101-4.76-PET
RouteCity Street 0
Coordinates38.24651, -122.62788
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.8 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span124 ft (37.8 m)
Deck width84 ft (25.7 m)
Roadway width68 ft (20.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2010)
Projected traffic28,182 by 2046
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 E Washington ST over US Highway 101 built?

It was built in 1975, making it 50 years old in 2025.

What condition is E Washington ST over US Highway 101 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does E Washington ST over US Highway 101 carry?

About 20,000 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is E Washington ST over US Highway 101?

The structure is 250 ft (76.2 m) long with a longest span of 124 ft (37.8 m) and a deck 84 ft wide.

Who owns E Washington ST over US Highway 101?

It is owned by the State Highway Agency.