Structure 6C0054 · Shasta County, CA

Lake Shore Drive over Charlie Creek

Carries Lake Shore Drive over Charlie Creek, 1.8 Mi SW Antlr Uc On I-5.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT400 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

400 ft end to end: 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 deck arch.

Built1926rebuilt 1981
Length399.9 ft121.9 m
Daily traffic1,383counted 2013
Last inspectedJuly 2023every 24 months

Location

StateCalifornia
CountyShasta
Location1.8 Mi SW Antlr Uc On I-5
CarriesLake Shore Drive
CrossesCharlie Creek
Coordinates40.86910, -122.39205

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length399.9 ft (121.9 m)
Max Span153.9 ft (46.9 m)
Deck Width25.3 ft (7.7 m)
Deck Area938.6 sq m
Main Spans1
Year Built1926 (reconstructed 1981)

Traffic

Avg Daily Traffic1,383 (2013)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number06C0054

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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