Structure 17 0013 · Nevada County, CA

Interstate 80 over Truckee River

Carries Interstate 80 over Truckee River, 03-nev-080-20.84.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT305 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

305 ft end to end, longest span 115 ft: about 4 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 multi-beam bridge.

Built200422 years old
Length305.1 ft93 m
Daily traffic28,000counted 2020
Last inspectedAugust 2024every 24 months

Location

StateCalifornia
CountyNevada
Location03-nev-080-20.84
CarriesInterstate 80
CrossesTruckee River
Coordinates39.37399, -120.10895

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length305.1 ft (93 m)
Max Span114.8 ft (35 m)
Deck Width107.3 ft (32.7 m)
Deck Area3041.1 sq m
Main Spans3
Year Built2004

Traffic

Avg Daily Traffic28,000 (2020)
Truck Traffic18%
Lanes On Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number17 0013

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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