US Bridges

Bethards Drive over Matanzas Creek

Fair

Sonoma County, California · Bet Techevah & Yulupa Av · Structure no. 20C0484

Built
1966
59 years old
Condition
Fair
inspected August 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
6,000
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bethards Drive over Matanzas Creek is a steel culvert carrying Bethards Drive over Matanzas Creek in Sonoma County, California. It was built in 1966, so it is 59 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 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 6,000 vehicles a day, roughly 2% of them trucks, projected to reach 4,347 by 2042. The structure is 21 ft (6.4 m) long and 86 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesBethards Drive
CrossesMatanzas Creek
LocationBet Techevah & Yulupa Av
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.42882, -122.66294
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span20 ft (6.2 m)
Deck width86 ft (26.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2010)
Projected traffic4,347 by 2042
Trucks2%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Bethards Drive over Matanzas Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Bethards Drive over Matanzas Creek 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 Bethards Drive over Matanzas Creek carry?

About 6,000 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Bethards Drive over Matanzas Creek?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.2 m) and a deck 86 ft wide.

Who owns Bethards Drive over Matanzas Creek?

It is owned by the City or Municipal Highway Agency.