Structure 24C0160 · Sacramento County, CA

Twin Cities RD over Cosumnes River

Carries Twin Cities RD over Cosumnes River, 2.3 Mi W Christensen RD.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT152 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

152 ft end to end, longest span 30 ft: about 2 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 slab bridge.

Built198343 years old
Length151.9 ft46.3 m
Daily traffic4,223counted 2009
Last inspectedOctober 2022every 48 months

Location

StateCalifornia
CountySacramento
Location2.3 Mi W Christensen RD
CarriesTwin Cities RD
CrossesCosumnes River
Coordinates38.29075, -121.37960

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length151.9 ft (46.3 m)
Max Span29.9 ft (9.1 m)
Deck Width36.7 ft (11.2 m)
Deck Area518.6 sq m
Main Spans5
Year Built1983

Traffic

Avg Daily Traffic4,223 (2009)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2022
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number24C0160

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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