Structure 19C0253R · Placer County, CA

Nelson Lane NB over Markham Ravine

Carries Nelson Lane NB over Markham Ravine, South Of Nicolaus Road.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT61 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

61 ft end to end. Lengths and the car 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.

Built201412 years old
Length61.0 ft18.6 m
Daily traffic6,950counted 2015
Last inspectedApril 2021every 48 months

Location

StateCalifornia
CountyPlacer
LocationSouth Of Nicolaus Road
CarriesNelson Lane NB
CrossesMarkham Ravine
Coordinates38.89436, -121.33981

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length61.0 ft (18.6 m)
Max Span61.0 ft (18.6 m)
Deck Width45.6 ft (13.9 m)
Deck Area258.5 sq m
Main Spans1
Year Built2014

Traffic

Avg Daily Traffic6,950 (2015)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number19C0253R

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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