Horizon Underground Inc safety record at a glance
Horizon Underground Inc has been the subject of 12 Cal/OSHA inspections in California since 2000, opened between May 26, 2004 and Jun 23, 2016. 11 of them were planned inspections. 1 of them produced citations, 3 in all: 0 serious. Inspectors proposed $1,125 in penalties; after appeals and settlements the current total is $685. The largest single penalty, $685, came from an inspection opened Dec 15, 2015 in Mojave. That places the employer at #59,896 of 122,853 California employers in the database by penalties.
Industry as coded by the inspecting office: Construction. Worksites in Corona, Mojave, San Bernardino, Ontario, Brawley, Riverside, Heber, Pollock Pines.
Every inspection, newest first
Click a date for the citations in that inspection.
| Opened | City | Why | Result | Penalty | Closed |
|---|---|---|---|---|---|
| Jun 23, 2016 | Corona | Planned | no citations | $0 | Nov 16, 2016 |
| Dec 15, 2015 | Mojave | Complaint | 3 citations | $685 $1,125 proposed | Jul 19, 2016 |
| Jun 28, 2007 | San Bernardino | Planned | no inspection made | $0 | Jun 28, 2007 |
| Jun 19, 2007 | San Bernardino | Planned | no inspection made | $0 | Jun 20, 2007 |
| Mar 27, 2007 | Ontario | Planned | no inspection made | $0 | Mar 27, 2007 |
| Oct 2, 2006 | Brawley | Planned | no inspection made | $0 | Oct 2, 2006 |
| Sep 8, 2006 | Riverside | Planned | no inspection made | $0 | Sep 11, 2006 |
| Feb 17, 2006 | Heber | Planned | no inspection made | $0 | Mar 6, 2006 |
| Dec 15, 2005 | Pollock Pines | Planned | no inspection made | $0 | Dec 16, 2005 |
| Nov 10, 2005 | Placerville | Planned | no inspection made | $0 | Dec 30, 2005 |
| Oct 14, 2005 | Heber | Planned | no inspection made | $0 | Oct 18, 2005 |
| May 26, 2004 | Beaumont | Planned | no inspection made | $0 | May 26, 2004 |
Also recorded as: Horizon Underground; Horizon Underground, Inc.
The rules this employer was cited under
- 8 CCR 3395, Heat illness prevention, outdoor: 1 citation, $280
- 8 CCR 1512, Emergency medical services (construction): 1 citation, $280
- 8 CCR 1509, Injury and Illness Prevention Program (construction): 1 citation, $125
Local pages: Corona employment lawyer, San Bernardino employment lawyer.
How to read this record
Each row is one inspection by Cal/OSHA (or, rarely, federal OSHA) of one worksite. Why is the reason it was opened. Penalty is the current figure after any appeal or settlement; where it was reduced, the amount the inspector first proposed is shown under it. "Serious" means a realistic possibility of death or serious harm; "willful" and "repeat" carry penalties up to $162,851 each.
Citations document that the employer was told, in writing, what the rule required and when. That knowledge is often the center of a retaliation case: a worker who complained about the hazard an inspector later cited, and was then fired or cut, has a Labor Code 6310 claim, with lost wages and attorney's fees.
Full explainer: how to read a Cal/OSHA record.
If you work, or worked, at Horizon Underground Inc
Write down what you reported, to whom and when, and what changed afterward: shifts, pay, duties, write-ups. Request the inspection file from the Cal/OSHA district office using the activity number on the inspection page. An injury goes through workers' compensation; a firing, demotion or threat after a safety complaint or injury report is an employment claim with a one-year deadline at the Labor Commissioner (Labor Code 6310) and a longer one in court. Free, confidential review: (800) 371-3088 or send what you have.
Source: U.S. Department of Labor OSHA enforcement data, California inspections. Record last checked Nov 4, 2026. Back to the safety tracker.
About this data: Records come from the U.S. Department of Labor's OSHA enforcement datasets (inspection, violation, accident and accident injury tables), which carry Cal/OSHA's state-plan inspections alongside federal ones. We load every inspection of a California worksite opened since January 1, 2000 and refresh it weekly. Employer names, addresses and industry codes are as the inspecting office recorded them; similar names are grouped where they clearly refer to the same employer. A citation can be reduced, vacated or withdrawn on appeal, and an inspection can stay open for months, so a record can change. Penalties shown as "current" reflect the latest status in the federal file. This page is public information about the employer's regulatory record, not legal advice and not a statement that any person was harmed or any law broken beyond what the record states.