US Bridges

Nelson Lane NB over Markham Ravine

Good

Placer County, California · South of Nicolaus Road · Structure no. 19C0253R

Built
2014
11 years old
Condition
Good
inspected April 2021
Type
Slab
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
6,950
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nelson Lane NB over Markham Ravine is a prestressed concrete slab carrying Nelson Lane NB over Markham Ravine in Placer County, California. It was built in 2014, so it is 11 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,950 vehicles a day, roughly 3% of them trucks, projected to reach 13,300 by 2038. The structure is 61 ft (18.6 m) long and 46 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesNelson Lane NB
CrossesMarkham Ravine
LocationSouth of Nicolaus Road
RouteCity Street 0
CountyPlacer County
StateCalifornia
Coordinates38.89436, -121.33981
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length61 ft (18.6 m)
Longest span61 ft (18.6 m)
Deck width46 ft (13.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,950 (2015)
Projected traffic13,300 by 2038
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nelson Lane NB over Markham Ravine built?

It was built in 2014, making it 11 years old in 2025.

What condition is Nelson Lane NB over Markham Ravine in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2021.

How much traffic does Nelson Lane NB over Markham Ravine carry?

About 6,950 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is Nelson Lane NB over Markham Ravine?

The structure is 61 ft (18.6 m) long with a longest span of 61 ft (18.6 m) and a deck 46 ft wide.

Who owns Nelson Lane NB over Markham Ravine?

It is owned by the City or Municipal Highway Agency.