US Bridges

Tachevah DR over Drainage Canal

Fair

Sonoma County, California · 0.1 M West Neutomas Ave · Structure no. 20C0196

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
3,000
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Tachevah DR over Drainage Canal is a prestressed concrete tee beam carrying Tachevah DR over Drainage Canal in Sonoma County, California. It was built in 1968, so it is 57 years old, older 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 5 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 3,000 vehicles a day, roughly 2% of them trucks, projected to reach 2,717 by 2042. The structure is 29 ft (8.8 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTachevah DR
CrossesDrainage Canal
Location0.1 M West Neutomas Ave
RouteCity Street 0
Coordinates38.4309, -122.67356
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width54 ft (16.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2010)
Projected traffic2,717 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Tachevah DR over Drainage Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Tachevah DR over Drainage Canal 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 August 2024.

How much traffic does Tachevah DR over Drainage Canal carry?

About 3,000 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Tachevah DR over Drainage Canal?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 54 ft wide.

Who owns Tachevah DR over Drainage Canal?

It is owned by the City or Municipal Highway Agency.