Structure 6C0345 · Shasta County, CA

Lawrence Road over West Branch Churn Creek

Carries Lawrence Road over West Branch Churn Creek, 0.3 Mi S Hartnell Ave..

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 39 ft across with 3 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.

Built200026 years old
Length39.4 ft12 m
Daily traffic1,855counted 2012
Last inspectedMay 2023every 48 months

Location

StateCalifornia
CountyShasta
Location0.3 Mi S Hartnell Ave.
CarriesLawrence Road
CrossesWest Branch Churn Creek
Coordinates40.55971, -122.34783

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length39.4 ft (12 m)
Max Span13.1 ft (4 m)
Deck Width60.0 ft (18.3 m)
Deck Area219.6 sq m
Main Spans3
Year Built2000

Traffic

Avg Daily Traffic1,855 (2012)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number06C0345

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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