Structure 20C0014 · Sonoma County, CA

Anapolis RD over South Fork Gualala River

Carries Anapolis RD over South Fork Gualala River, 1.5 Mi E/o SR 1.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT461 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

461 ft end to end, longest span 170 ft: about 6 semi-trucks nose to tail. Lengths and the semi-truck 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 box-beam bridge.

Built197452 years old
Length461.0 ft140.5 m
Daily traffic400counted 2015
Last inspectedJune 2023every 24 months

Location

StateCalifornia
CountySonoma
Location1.5 Mi E/o SR 1
CarriesAnapolis RD
CrossesSouth Fork Gualala River
Coordinates38.70014, -123.41576

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length461.0 ft (140.5 m)
Max Span169.9 ft (51.8 m)
Deck Width32.5 ft (9.9 m)
Deck Area1391.0 sq m
Main Spans3
Year Built1974

Traffic

Avg Daily Traffic400 (2015)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number20C0014

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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