Structure I 959N · Clark County, NV

I 15n over Sr610 Lamb BLVD

Carries I 15n over Sr610 Lamb BLVD, North Las Vegas.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

233 ft end to end: about 3 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 box-beam bridge.

Built200521 years old
Length233.3 ft71.1 m
Daily traffic24,000counted 2021
Last inspectedMarch 2024every 48 months

Location

StateNevada
CountyClark
LocationNorth Las Vegas
CarriesI 15n
CrossesSr610 Lamb BLVD
Coordinates36.25812, -115.07979

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length233.3 ft (71.1 m)
Max Span228.0 ft (69.5 m)
Deck Width63.0 ft (19.2 m)
Deck Area1365.1 sq m
Main Spans1
Year Built2005

Traffic

Avg Daily Traffic24,000 (2021)
Truck Traffic10%
Lanes On Bridge3
Lanes Under Bridge6

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberI 959N

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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