Structure 24C0056 · Sacramento County, CA

Michigan Bar RD over Cosumnes River

Carries Michigan Bar RD over Cosumnes River, 1.2 Mi N Of S.r. 16.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT354 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

354 ft end to end, longest span 138 ft: about 5 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 truss.

Built1909rebuilt 1958
Length354.3 ft108 m
Daily traffic21counted 2011
Last inspectedApril 2024every 12 months

Location

StateCalifornia
CountySacramento
Location1.2 Mi N Of S.r. 16
CarriesMichigan Bar RD
CrossesCosumnes River
Coordinates38.49994, -121.04509

Physical Characteristics

MaterialSteel
DesignTruss - Deck
Total Length354.3 ft (108 m)
Max Span138.1 ft (42.1 m)
Deck Width11.2 ft (3.4 m)
Deck Area367.2 sq m
Main Spans2
Year Built1909 (reconstructed 1958)

Traffic

Avg Daily Traffic21 (2011)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number24C0056

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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