Structure 17 0076L · Nevada County, CA

Interstate 80 WB over Donner Lake Road

Carries Interstate 80 WB over Donner Lake Road, 03-nev-080-r9.07l.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT271 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

271 ft end to end, longest span 90 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.

Built1963rebuilt 1991
Length271.0 ft82.6 m
Daily traffic12,400counted 2020
Last inspectedAugust 2024every 48 months

Location

StateCalifornia
CountyNevada
Location03-nev-080-r9.07l
CarriesInterstate 80 WB
CrossesDonner Lake Road
Coordinates39.33166, -120.28992

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length271.0 ft (82.6 m)
Max Span89.9 ft (27.4 m)
Deck Width54.5 ft (16.6 m)
Deck Area1371.2 sq m
Main Spans3
Year Built1963 (reconstructed 1991)

Traffic

Avg Daily Traffic12,400 (2020)
Truck Traffic11%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number17 0076L

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.

Nearby Bridges