Safety Incidents OSHA Severe Injury Reports · 2015–2025
5,189,992Inspections Most recent open 2026-07-18 Last loaded 2026-07-22

OSHA Inspection: MAMMOTH UNDERGROUND, LLC

Planned inspection · Safety discipline

On , OSHA opened a planned safety inspection of MAMMOTH UNDERGROUND, LLC in 620 SHADOW LANE, LAS VEGAS, NV 89106 (NAICS 238910). OSHA activity number 312279706.

What this inspection record means

OSHA opens inspections for many reasons — routine scheduling under a national or local emphasis program, an employee complaint or referral, or a follow-up after a reported injury. Opening or conducting an inspection is not itself an allegation or a finding that this employer broke any rule; any findings appear as the citations listed below, and citations can be contested, reduced, or withdrawn.

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Site address
620 SHADOW LANE
City
LAS VEGAS
State
NV
ZIP
89106
Mailing
421 WEST BONANZA ROAD, LAS VEGAS, NV 89106
Inspection type
Planned (H)
Scope
Complete (A)
Discipline
Safety
Advance notice
No
Union status
N
Opened
Closing conference
Case closed
Last modified
Data loaded
NAICS code
238910
SIC code (legacy)
1794
Employees
2
Ownership type
A
Industry flags
Construction safety.

3 citations on file for this inspection.

1926.652 A01

Deleted Repeat Gravity 02 1 instance 1 exposed
Issued
Dec 8, 2008
Abate by
Dec 11, 2008
Penalty
Initial $2,400
Recent events (2)
  • — W (R)
  • — Z (R) $2400.00

618037601

Other-than-serious Gravity 01 1 instance 2 exposed
Issued
Oct 30, 2008
Abate by
Nov 4, 2008

618054202 A

Other-than-serious Gravity 01 1 instance 30 exposed
Issued
Oct 30, 2008
Abate by
Nov 4, 2008

View Mammoth Underground, LLC's full OSHA safety record →

This record is reproduced from the U.S. Department of Labor Open Data API (OSHA inspection dataset). The original IMIS detail view is available at OSHA's Establishment Search for activity number 312279706.

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