Structure 24C0504 · Sacramento County, CA

Folsom -auburn Bl over American River Lk Natoma

Carries Folsom -auburn Bl over American River Lk Natoma, 0.3 Mi South Of Greenback.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,266 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

2,266 ft end to end, longest span 328 ft: about 6.3 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 box-beam bridge.

Built199927 years old
Length2265.7 ft690.6 m
Daily traffic25,000counted 2016
Last inspectedMay 2024every 24 months

Location

StateCalifornia
CountySacramento
Location0.3 Mi South Of Greenback
CarriesFolsom -auburn Bl
CrossesAmerican River Lk Natoma
Coordinates38.67794, -121.18061

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Single/Spread
Total Length2265.7 ft (690.6 m)
Max Span328.1 ft (100 m)
Deck Width111.2 ft (33.9 m)
Deck Area23411.3 sq m
Main Spans5
Year Built1999

Traffic

Avg Daily Traffic25,000 (2016)
Truck Traffic7%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number24C0504

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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