Establishment profile
TRIANGLE ROCK PRODUCTS INC
5303 SANTIAGO CANYON ROAD, SILVERADO CANYON, CA, 92676
Operated by Vulcan Materials CO · 1 of 301 establishments
Summary
TRIANGLE ROCK PRODUCTS INC has accumulated 4 OSHA violations across 3 inspections over 29 years of recorded history, with $1,325 in total assessed penalties.
The establishment sits in the 76th percentile for violations within its industry-state peer group of 119,034 employers. Inspection frequency runs at the 95th percentile. The most recent enforcement activity was recorded 27 years ago.
Federal records were found in 2 of 15 sources. Sources without matching records returned empty for this establishment.
Agency coverage
TRIANGLE ROCK PRODUCTS INC appears in OSHA workplace safety and MSHA mine safety records only. No matching records were found in WHD wage enforcement, EPA environmental compliance, NLRB labor relations, OFLC visa and labor certification (historical), FMCSA motor carrier registration, SAM.gov federal debarment, CMS nursing home enforcement, CPSC product recalls, or NHTSA vehicle recalls.
OSHA workplace safety
67% of inspections at this establishment produced violations,
Most-cited OSHA standards
Top OSHA standards cited at this employer, ranked by citation count. Standards (CFR sections) cluster citations into safety themes -- machine guarding, lockout-tagout, hazard communication, fall protection, process safety, etc. A concentration on one or two sections reveals a pattern that individual citations don’t. 4 distinct standards shown · 4 citations in this view · $1,325 in penalties.
| CFR section | Citations | Inspections | Total penalty | First cited | Last cited |
|---|---|---|---|---|---|
| 3999 B | 1 | 1 | $875 | Jul 1999 | Jul 1999 |
| 4650 E | 1 | 1 | $225 | Jul 1999 | Jul 1999 |
| 4650 F | 1 | 1 | $225 | Jul 1999 | Jul 1999 |
| 3660 A | 1 | 1 | — | Nov 1996 | Nov 1996 |
Source: OSHA inspection citations (violation_detail). CFR section codes can be looked up at osha.gov/laws-regs for the formal standard text. Per-inspection detail and the specific violation descriptions are available by expanding individual inspections below.
Peer comparison
Above average violations. Peer group: 119,034 employers. This establishment has 4 OSHA violations; peer median is 1.
Safety self-report (OSHA 300A)
No self-reported injury rates filed with OSHA's Injury Tracking Application for TRIANGLE ROCK PRODUCTS INC. Verify directly with OSHA Injury Tracking Application →
Inspection breakdown
Complaint- and accident-triggered inspections are stronger risk signals than routine planned inspections.
OSHA severe injury reports
No severe injury reports (hospitalization, amputation, or loss of an eye) on file under 29 CFR 1904.39 for TRIANGLE ROCK PRODUCTS INC. Verify directly with Occupational Safety and Health Administration →
Activity timeline
No federal enforcement activity has been recorded against this establishment in 27+ years. Most recent activity: 27 years ago. Data on this page is refreshed weekly.
Wage & Hour Division (WHD)
No WHD wage, overtime, or child-labor enforcement cases on file for TRIANGLE ROCK PRODUCTS INC. Verify directly with Wage and Hour Division →
Mine safety (MSHA)
Company-level in CA — for Vulcan Materials CO, not this location alone
Mine Safety & Health Administration — citations issued at mining operations. MSHA records cases at the company/regional level (no worksite address), so these are matched by company name and state and may span other Vulcan Materials CO operations in the same state.
MSHA citations
Mine Safety and Health Administration citations. S&S (significant and substantial) marks violations that could reasonably contribute to a serious injury. Negligence rating is MSHA’s operator-culpability assessment (none, low, moderate, high, or reckless disregard). Proposed = assessed at issuance; Paid = post-settlement / appeal. 100 citations · 17S&S · $17,805 proposed / $17,755 paid.
| Citation | Mine | Date | Section | S&S | Negligence | Proposed | Paid |
|---|---|---|---|---|---|---|---|
| 8873836 | TRP-Sacramento Plant Sacramento, CA | Sep 2015 | — | Yes | HighNegligence | $2,300 | $2,300 |
| 9535624 | TRP Table Mountain Plant Butte, CA | Aug 2022 | — | Yes | ModNegligence | $840 | $840 |
| 6443185 | TRP-Los Banos Plant Merced, CA | Jan 2009 | — | Yes | ModNegligence | $745 | $745 |
| 6486965 | TRP-Sacramento Plant Sacramento, CA | Nov 2009 | — | Yes | ModNegligence | $687 | $687 |
| 6345458 | TRP Table Mountain Plant Butte, CA | Jun 2013 | — | Yes | ModNegligence | $634 | $634 |
| 8695864 | TRP Table Mountain Plant Butte, CA | Oct 2012 | — | No | LowNegligence | $425 | $375 |
| 6345568 | TRP Table Mountain Plant Butte, CA | Jan 2014 | — | Yes | ModNegligence | $308 | $308 |
| 8879350 | TRP Table Mountain Plant Butte, CA | Apr 2016 | — | Yes | LowNegligence | $285 | $285 |
| 8793915 | TRP-Sacramento Plant Sacramento, CA | Aug 2016 | — | Yes | ModNegligence | $235 | $235 |
| 8793691 | TRP-Los Banos Plant Merced, CA | Apr 2015 | — | Yes | ModNegligence | $190 | $190 |
| 6481345 | TRP-Sacramento Plant Sacramento, CA | Aug 2013 | — | Yes | ModNegligence | $190 | $190 |
| 8603815 | TRP Table Mountain Plant Butte, CA | Mar 2011 | — | Yes | ModNegligence | $190 | $190 |
| 8703398 | TRP-Los Banos Plant Merced, CA | Jul 2014 | — | Yes | ModNegligence | $176 | $176 |
| 8703308 | TRP-Los Banos Plant Merced, CA | Dec 2013 | — | Yes | ModNegligence | $176 | $176 |
| 8603925 | TRP-Los Banos Plant Merced, CA | Nov 2011 | — | Yes | ModNegligence | $176 | $176 |
| 8561935 | TRP-Los Banos Plant Merced, CA | Dec 2010 | — | Yes | ModNegligence | $176 | $176 |
| 6432505 | TRP Table Mountain Plant Butte, CA | Apr 2008 | — | Yes | ModNegligence | $162 | $162 |
| 8991297 | TRP-Sacramento Plant Sacramento, CA | Jan 2017 | — | No | ModNegligence | $160 | $160 |
| 5162423 | TRP-Los Banos Plant Merced, CA | Jun 2026 | — | No | LowNegligence | $151 | $151 |
| 5162422 | TRP-Los Banos Plant Merced, CA | Jun 2026 | — | No | LowNegligence | $151 | $151 |
| 9890918 | TRP-Los Banos Plant Merced, CA | Nov 2025 | — | No | LowNegligence | $151 | $151 |
| 9890917 | TRP-Los Banos Plant Merced, CA | Nov 2025 | — | No | ModNegligence | $151 | $151 |
| 5106061 | TRP Table Mountain Plant Butte, CA | Oct 2025 | — | No | LowNegligence | $151 | $151 |
| 9680850 | TRP-Sacramento Plant Sacramento, CA | Oct 2025 | — | No | LowNegligence | $151 | $151 |
| 9999573 | TRP-Sacramento Plant Sacramento, CA | Jul 2025 | — | No | LowNegligence | $151 | $151 |
| 9680825 | TRP-Sacramento Plant Sacramento, CA | Jul 2025 | — | No | LowNegligence | $151 | $151 |
| 9890200 | TRP-Los Banos Plant Merced, CA | Jun 2025 | — | No | ModNegligence | $151 | $151 |
| 9999572 | TRP-Sacramento Plant Sacramento, CA | Jan 2025 | — | No | LowNegligence | $151 | $151 |
| 9990808 | TRP-Los Banos Plant Merced, CA | Dec 2024 | — | No | ModNegligence | $151 | $151 |
| 9372023 | TRP Table Mountain Plant Butte, CA | Mar 2017 | — | No | ModNegligence | $148 | $148 |
| 8912575 | TRP-Sacramento Plant Sacramento, CA | Nov 2024 | — | No | ModNegligence | $147 | $147 |
| 8912574 | TRP-Sacramento Plant Sacramento, CA | Nov 2024 | — | No | LowNegligence | $147 | $147 |
| 8912573 | TRP-Sacramento Plant Sacramento, CA | Nov 2024 | — | No | LowNegligence | $147 | $147 |
| 9619658 | TRP-Sacramento Plant Sacramento, CA | Jul 2023 | — | No | ModNegligence | $143 | $143 |
| 9619657 | TRP-Sacramento Plant Sacramento, CA | Jul 2023 | — | No | ModNegligence | $143 | $143 |
| 9619656 | TRP-Sacramento Plant Sacramento, CA | Jul 2023 | — | No | ModNegligence | $143 | $143 |
| 8702529 | TRP-Sacramento Plant Sacramento, CA | Oct 2013 | — | No | ModNegligence | $142 | $142 |
| 6486963 | TRP-Sacramento Plant Sacramento, CA | Nov 2009 | — | No | ModNegligence | $138 | $138 |
| 6484099 | TRP-Sacramento Plant Sacramento, CA | Jun 2009 | — | No | ModNegligence | $138 | $138 |
| 6484098 | TRP-Sacramento Plant Sacramento, CA | Jun 2009 | — | No | ModNegligence | $138 | $138 |
| 9509098 | TRP-Sacramento Plant Sacramento, CA | Jan 2022 | — | No | ModNegligence | $133 | $133 |
| 9509097 | TRP-Sacramento Plant Sacramento, CA | Jan 2022 | — | No | LowNegligence | $133 | $133 |
| 6487086 | TRP Table Mountain Plant Butte, CA | May 2010 | — | No | ModNegligence | $127 | $127 |
| 6487085 | TRP Table Mountain Plant Butte, CA | May 2010 | — | No | ModNegligence | $127 | $127 |
| 6487084 | TRP Table Mountain Plant Butte, CA | May 2010 | — | No | ModNegligence | $127 | $127 |
| 6487037 | TRP-Sacramento Plant Sacramento, CA | Apr 2010 | — | No | ModNegligence | $127 | $127 |
| 6487036 | TRP-Sacramento Plant Sacramento, CA | Apr 2010 | — | No | ModNegligence | $127 | $127 |
| 9530698 | TRP-Los Banos Plant Merced, CA | Aug 2021 | — | No | LowNegligence | $125 | $125 |
| 8690441 | TRP-Los Banos Plant Merced, CA | Mar 2021 | — | No | LowNegligence | $125 | $125 |
| 9502220 | TRP-Sacramento Plant Sacramento, CA | Feb 2020 | — | No | ModNegligence | $123 | $123 |
| 8779094 | TRP-Sacramento Plant Sacramento, CA | Nov 2019 | — | No | ModNegligence | $121 | $121 |
| 8609464 | TRP-Sacramento Plant Sacramento, CA | Aug 2011 | — | No | ModNegligence | $117 | $117 |
| 8568981 | TRP-Sacramento Plant Sacramento, CA | Feb 2011 | — | No | ModNegligence | $117 | $117 |
| 8568979 | TRP-Sacramento Plant Sacramento, CA | Feb 2011 | — | No | ModNegligence | $117 | $117 |
| 8568978 | TRP-Sacramento Plant Sacramento, CA | Feb 2011 | — | No | ModNegligence | $117 | $117 |
| 8690330 | TRP-Sacramento Plant Sacramento, CA | Aug 2017 | — | No | ModNegligence | $116 | $116 |
| 8690329 | TRP-Sacramento Plant Sacramento, CA | Aug 2017 | — | No | ModNegligence | $116 | $116 |
| 9372022 | TRP Table Mountain Plant Butte, CA | Mar 2017 | — | No | ModNegligence | $116 | $116 |
| 9372021 | TRP Table Mountain Plant Butte, CA | Mar 2017 | — | No | LowNegligence | $116 | $116 |
| 8991296 | TRP-Sacramento Plant Sacramento, CA | Jan 2017 | — | No | ModNegligence | $116 | $116 |
| 8991295 | TRP-Sacramento Plant Sacramento, CA | Jan 2017 | — | No | ModNegligence | $116 | $116 |
| 8793919 | TRP-Sacramento Plant Sacramento, CA | Aug 2016 | — | No | ModNegligence | $114 | $114 |
| 8793918 | TRP-Sacramento Plant Sacramento, CA | Aug 2016 | — | No | ModNegligence | $114 | $114 |
| 8793917 | TRP-Sacramento Plant Sacramento, CA | Aug 2016 | — | No | ModNegligence | $114 | $114 |
| 8793916 | TRP-Sacramento Plant Sacramento, CA | Aug 2016 | — | No | LowNegligence | $114 | $114 |
| 8879349 | TRP Table Mountain Plant Butte, CA | Apr 2016 | — | No | ModNegligence | $100 | $100 |
| 8873543 | TRP-Sacramento Plant Sacramento, CA | Feb 2016 | — | No | LowNegligence | $100 | $100 |
| 8873653 | TRP-Los Banos Plant Merced, CA | Feb 2016 | — | No | LowNegligence | $100 | $100 |
| 8793692 | TRP-Los Banos Plant Merced, CA | Apr 2015 | — | No | ModNegligence | $100 | $100 |
| 8703254 | TRP-Sacramento Plant Sacramento, CA | Mar 2015 | — | No | LowNegligence | $100 | $100 |
| 8785895 | TRP Table Mountain Plant Butte, CA | Nov 2014 | — | No | LowNegligence | $100 | $100 |
| 8785894 | TRP Table Mountain Plant Butte, CA | Nov 2014 | — | No | ModNegligence | $100 | $100 |
| 8793604 | TRP-Sacramento Plant Sacramento, CA | Aug 2014 | — | Yes | LowNegligence | $100 | $100 |
| 8793603 | TRP-Sacramento Plant Sacramento, CA | Aug 2014 | — | No | ModNegligence | $100 | $100 |
| 8703400 | TRP-Los Banos Plant Merced, CA | Jul 2014 | — | No | ModNegligence | $100 | $100 |
| 8703397 | TRP-Los Banos Plant Merced, CA | Jul 2014 | — | No | LowNegligence | $100 | $100 |
| 8703396 | TRP-Los Banos Plant Merced, CA | Jul 2014 | — | No | ModNegligence | $100 | $100 |
| 6345567 | TRP Table Mountain Plant Butte, CA | Jan 2014 | — | No | ModNegligence | $100 | $100 |
| 8703307 | TRP-Los Banos Plant Merced, CA | Dec 2013 | — | No | ModNegligence | $100 | $100 |
| 8703306 | TRP-Los Banos Plant Merced, CA | Dec 2013 | — | No | ModNegligence | $100 | $100 |
| 8703305 | TRP-Los Banos Plant Merced, CA | Dec 2013 | — | No | ModNegligence | $100 | $100 |
| 6481344 | TRP-Sacramento Plant Sacramento, CA | Aug 2013 | — | No | ModNegligence | $100 | $100 |
| 8698643 | TRP-Los Banos Plant Merced, CA | Mar 2013 | — | No | LowNegligence | $100 | $100 |
| 8695976 | TRP-Sacramento Plant Sacramento, CA | Nov 2012 | — | No | LowNegligence | $100 | $100 |
| 8695869 | TRP Table Mountain Plant Butte, CA | Oct 2012 | — | No | ModNegligence | $100 | $100 |
| 8695868 | TRP Table Mountain Plant Butte, CA | Oct 2012 | — | No | LowNegligence | $100 | $100 |
| 8695867 | TRP Table Mountain Plant Butte, CA | Oct 2012 | — | No | LowNegligence | $100 | $100 |
| 8695866 | TRP Table Mountain Plant Butte, CA | Oct 2012 | — | No | ModNegligence | $100 | $100 |
| 8695865 | TRP Table Mountain Plant Butte, CA | Oct 2012 | — | No | ModNegligence | $100 | $100 |
| 8613009 | TRP-Sacramento Plant Sacramento, CA | Jun 2012 | — | No | ModNegligence | $100 | $100 |
| 8613351 | TRP-Los Banos Plant Merced, CA | May 2012 | — | No | ModNegligence | $100 | $100 |
| 8613350 | TRP-Los Banos Plant Merced, CA | May 2012 | — | No | ModNegligence | $100 | $100 |
| 8609877 | TRP Table Mountain Plant Butte, CA | Jan 2012 | — | No | LowNegligence | $100 | $100 |
| 8609467 | TRP-Sacramento Plant Sacramento, CA | Aug 2011 | — | No | LowNegligence | $100 | $100 |
| 8609466 | TRP-Sacramento Plant Sacramento, CA | Aug 2011 | — | No | ModNegligence | $100 | $100 |
| 8609465 | TRP-Sacramento Plant Sacramento, CA | Aug 2011 | — | No | ModNegligence | $100 | $100 |
| 8609463 | TRP-Sacramento Plant Sacramento, CA | Aug 2011 | — | No | ModNegligence | $100 | $100 |
| 6387383 | TRP-Los Banos Plant Merced, CA | May 2011 | — | No | LowNegligence | $100 | $100 |
| 6387382 | TRP-Los Banos Plant Merced, CA | May 2011 | — | No | ModNegligence | $100 | $100 |
| 8603814 | TRP Table Mountain Plant Butte, CA | Mar 2011 | — | No | LowNegligence | $100 | $100 |
Source: MSHA citation database. “Contractor” annotations indicate the cited party was on-site at the mine but not the mine’s operator -- responsibility attaches to the contractor LLC, not the mine’s owner. Section codes reference 30 CFR (the Mine Safety and Health regulations).
Labor relations (NLRB)
No NLRB unfair labor practice charges or union representation cases on file for TRIANGLE ROCK PRODUCTS INC. Verify directly with National Labor Relations Board →
Visa & labor certification (OFLC) — historical
No H-1B, H-2A, or H-2B labor condition applications on file (historical data only — DOL ended OFLC publication) for TRIANGLE ROCK PRODUCTS INC. Verify directly with Office of Foreign Labor Certification →
Environmental compliance (EPA)
No EPA inspections or formal enforcement actions on file for TRIANGLE ROCK PRODUCTS INC. Verify directly with Environmental Protection Agency →
Federal contracts
No federal contracts are recorded to this specific location.
Consolidated across all USAspending recipient entities under this corporate parent — not attributable to this single location.
Federal contract activity for the parent corporation. Source: USAspending.gov, net obligations. Recipient address is the SAM registration / HQ address, not necessarily the worksite.
Inspection history
| Date | Trigger | Violations | Serious | Penalty | |
|---|---|---|---|---|---|
| 1999-06-05 | Planned | 3 | 1 | $1,325 | |
| 1997-09-24 | Planned | 0 | — | $0 | |
| 1996-10-03 | Planned | 1 | — | $0 |
Source: OSHA IMIS. Citation amounts reflect initially assessed penalties; final amounts after appeal may differ.
In the news
Part of a larger organization
TRIANGLE ROCK PRODUCTS INC is one of 301 establishments rolled up under the parent organization Vulcan Materials CO.
Federal enforcement records on this page represent activity at this specific establishment only. The full enforcement footprint of Vulcan Materials CO across all 301 of its tracked locations is viewable on the parent profile.
Other locations under this parent
Other establishments operated by Vulcan Materials CO, ordered by federal enforcement volume:
- HEAVY MATERIALS, LLCST THOMAS, VI — 4 federal enforcement records
- FLORIDA ROCK INDUSTRIES, INC.PALATKA, FL — 3 federal enforcement records
- FLORIDA ROCK INDUSTRIES, INC.TALLAHASSEE, FL — 3 federal enforcement records
- FLORIDA ROCK INDUSTRIES INC.MIAMI, FL — 3 federal enforcement records
- HEAVY MATERIALSST THOMAS, VI — 3 federal enforcement records
- FLORIDA ROCK INDUSTRIES INC.TAMPA, FL — 3 federal enforcement records
- FLORIDA ROCK INDUSTRIES INCClearwater, FL — 3 federal enforcement records
- HEAVY MATERIALS LLCFREDERIKSTED, VI — 3 federal enforcement records
- FLORIDA ROCK INDUSTRIES, INC.TARPON SPRINGS, FL — 3 federal enforcement records
- FLORIDA ROCK INDUSTRIES INCJacksonville, FL — 3 federal enforcement records
Related searches
- All Vulcan Materials CO locationsParent rollup
- Employers in CAState-wide enforcement data
About this data
This profile aggregates federal enforcement records on TRIANGLE ROCK PRODUCTS INC from every major federal compliance and enforcement source. OSHA workplace safety inspections, WHD wage cases, MSHA mine safety, EPA environmental enforcement, NLRB labor relations, OFLC visa/labor certification, FMCSA motor carrier registration, SAM.gov debarments, CMS nursing-home records, BLS industry safety benchmarks, OSHA ITA self-reported injury rates, SEC enforcement and financial disclosures, CPSC and NHTSA recalls.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. This establishment resolves to the parent rollup Vulcan Materials CO, which operates 301 establishments in our dataset.
OSHA citations typically appear 3–8 months after the inspection, so very recent enforcement actions may not yet be reflected. Profiles may be incomplete if the establishment operates under multiple legal names or files under variations our entity-matching rules don’t yet cover. To report a missing record or correction, email corrections@fastdol.com.
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Contact sales →Frequently asked
- What is TRIANGLE ROCK PRODUCTS INC's OSHA violation history?
- TRIANGLE ROCK PRODUCTS INC has 3 OSHA inspections on record with 4 violations and $1,325 in total penalties.