# ROCK OF AGES DARK SIDE

- **MSHA mine ID:** 4300023
- **Status:** Active
- **Type / commodity:** Surface / Dimension Granite
- **Location:** Washington, VT
- **Operator:** Rock of Ages
- **Controller:** Polycor Inc
- **Public source rows linked:** 983
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Polycor Inc (M12431) → Rock of Ages (L07520) → ROCK OF AGES DARK SIDE (4300023)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Nortek Inc → Rock Of Ages Corp:** 1978-03-09 through 1984-02-21; derived from co-tenure at mine 4300023; source `msha-controller-operator-history`.
- **Kurt M  Swenson → Rock of Ages:** 1984-02-22 through 2016-09-20; derived from co-tenure at mine 4300023; source `msha-controller-operator-history`.
- **Polycor Inc → Rock of Ages:** 2016-09-21 through current/open; derived from co-tenure at mine 4300023; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 1 since 2021:** Accidents and injuries 49 historical accident/injury rows; 0 coded fatalities and 686 lost days across the published record.
2. **COMPLIANCE — 30 since 2021:** Violations and penalties 125 violation rows across the full record; 19 carry an S&S flag and $21,835 appears in current assessed amounts.
3. **HEALTH — 32 samples:** Occupational health samples 32 personal. 0 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 18K employee hours and 41 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 24 linked rows:** Contests, conferences and decisions 10 contested-violation rows, 10 civil-penalty docket/decision rows, and 4 conference records linked by issuance number.
6. **CONTRACTORS — 3 linked entities:** Contractors Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
7. **INSPECTIONS — 11 since 2021:** Inspections 60 inspection events and 1K published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 56.12067 — Installation of transformers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12067
- **30 CFR 62.174 — Follow-up corrective measures when a standard threshold shift is detected.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.174
- **30 CFR 62.175 — Notification of results; reporting requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.175
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.11009 — Walkways along conveyors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11009
- **30 CFR 56.6101 — Areas around explosive material storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-E/section-56.6101
- **30 CFR 56.12047 — Guy wires.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12047
- **30 CFR 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 46.8 — Annual refresher training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.8
- **30 CFR 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003

## Source coverage

- **Accident, Injuries, and Illnesses:** 49 rows; 2000-08-22 through 2021-02-24; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2012-06-29 through 2012-06-29; source ID `msha-addresses`
- **Assessed Violations:** 125 rows; 2000-04-19 through 2026-04-24; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 10 rows; 2010-04-07 through 2016-03-22; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2019-07-02 through 2025-12-15; source ID `msha-conferences`
- **Contested Violations:** 10 rows; 2008-10-28 through 2015-06-25; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 399 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 83 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1978-03-09 through 1984-02-22; source ID `msha-controller-operator-history`
- **Inspections:** 60 rows; 2000-04-19 through 2026-04-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 57 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 32 rows; 2002-05-16 through 2026-03-11; source ID `msha-personal-health-samples`
- **Violations:** 125 rows; 2000-04-19 through 2026-04-24; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/rock-of-ages-dark-side-4300023`
- JSON: `/api/v1/mines/rock-of-ages-dark-side-4300023`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4300023/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4300023/relationships`
- MCP resource: `mine://4300023/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`