Structure 18 0017L · Sutter County, CA

State Route 99 SB over Cross Canal

Carries State Route 99 SB over Cross Canal, 03-sut-099-5.92.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT623 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

623 ft end to end, longest span 22 ft: about 1.7 football fields. 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 slab bridge.

Built1949rebuilt 1975
Length623.0 ft189.9 m
Daily traffic18,750counted 2019
Last inspectedMay 2024every 24 months

Location

StateCalifornia
CountySutter
Location03-sut-099-5.92
CarriesState Route 99 SB
CrossesCross Canal
Coordinates38.82075, -121.54381

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length623.0 ft (189.9 m)
Max Span22.0 ft (6.7 m)
Deck Width43.6 ft (13.3 m)
Deck Area2525.7 sq m
Main Spans28
Year Built1949 (reconstructed 1975)

Traffic

Avg Daily Traffic18,750 (2019)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number18 0017L

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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