# Quail Hollow Operation

- **MSHA mine ID:** 0403177
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Santa Cruz, CA
- **Operator:** Granite Rock Company
- **Controller:** Peter J  Lemon
- **Public source rows linked:** 699
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Peter J  Lemon (0174321) → Granite Rock Company (L01588) → Quail Hollow Operation (0403177)**

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

## Controller and operator valid-time history

- **Thomas J  Nicholson → Santa Cruz Aggregates:** 1950-01-01 through 1996-12-31; derived from co-tenure at mine 0403177; source `msha-controller-operator-history`.
- **Bruce W  Woolpert  et al → Granite Rock Company:** 1997-01-01 through 2012-07-22; derived from co-tenure at mine 0403177; source `msha-controller-operator-history`.
- **Thomas H  Squeri et al → Granite Rock Company:** 2012-07-23 through 2022-12-31; derived from co-tenure at mine 0403177; source `msha-controller-operator-history`.
- **Peter J  Lemon → Granite Rock Company:** 2023-01-01 through current/open; derived from co-tenure at mine 0403177; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 1 since 2021:** Accidents and injuries 8 historical accident/injury rows; 0 coded fatalities and 65 lost days across the published record.
2. **COMPLIANCE — 15 since 2021:** Violations and penalties 126 violation rows across the full record; 14 carry an S&S flag and $21,690 appears in current assessed amounts.
3. **HEALTH — 19 samples:** Occupational health samples 19 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 3K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 59 linked rows:** Contests, conferences and decisions 18 contested-violation rows, 19 civil-penalty docket/decision rows, and 22 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 14 since 2021:** Inspections 67 inspection events and 886 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 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.14115 — Stationary grinding machines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14115
- **30 CFR 56.14112 — Construction and maintenance of guards.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2003-01-17 through 2025-05-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1973-05-23 through 1973-05-23; source ID `msha-addresses`
- **Assessed Violations:** 126 rows; 2001-01-18 through 2025-06-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 19 rows; 2001-11-07 through 2013-07-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 22 rows; 2001-01-26 through 2024-09-20; source ID `msha-conferences`
- **Contested Violations:** 18 rows; 2007-01-16 through 2012-07-12; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 17 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 6 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1997-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 67 rows; 2001-01-18 through 2026-07-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 53 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:** 19 rows; 2002-05-22 through 2026-01-15; source ID `msha-personal-health-samples`
- **Violations:** 126 rows; 2001-01-18 through 2025-06-17; 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/quail-hollow-operation-0403177`
- JSON: `/api/v1/mines/quail-hollow-operation-0403177`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0403177/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0403177/relationships`
- MCP resource: `mine://0403177/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`