Structure 14 0020 · Lake County, CA

State Route 175 over Dry Creek

Carries State Route 175 over Dry Creek, 01-lak-175-27.48.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 111 ft across with 8 openings. 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, so those are drawn as typical for a culvert.

Built195274 years old
Length110.9 ft33.8 m
Daily traffic3,150counted 2009
Last inspectedOctober 2024every 48 months

Location

StateCalifornia
CountyLake
Location01-lak-175-27.48
CarriesState Route 175
CrossesDry Creek
Coordinates38.75492, -122.62557

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length110.9 ft (33.8 m)
Max Span14.1 ft (4.3 m)
Deck Width39.4 ft (12 m)
Deck Area405.6 sq m
Main Spans8
Year Built1952

Traffic

Avg Daily Traffic3,150 (2009)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number14 0020

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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