Structure 20C0195 · Sonoma County, CA

Yulupa AVE over Matanzas Creek

Carries Yulupa AVE over Matanzas Creek, 0.2 M South Creekside RD.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT102 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

102 ft end to end, longest span 41 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.

Built196165 years old
Length102.0 ft31.1 m
Daily traffic10,000counted 2010
Last inspectedAugust 2024every 24 months

Location

StateCalifornia
CountySonoma
Location0.2 M South Creekside RD
CarriesYulupa AVE
CrossesMatanzas Creek
Coordinates38.43224, -122.66820

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length102.0 ft (31.1 m)
Max Span41.0 ft (12.5 m)
Deck Width77.8 ft (23.7 m)
Deck Area737.1 sq m
Main Spans3
Year Built1961

Traffic

Avg Daily Traffic10,000 (2010)
Truck Traffic2%
Lanes On Bridge3

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number20C0195

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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