# Agate Quarry

- **MSHA mine ID:** 2100013
- **Status:** Intermittent
- **Type / commodity:** Surface / Dimension Granite
- **Location:** Big Stone, MN
- **Operator:** Cold Spring Granite Company
- **Controller:** Patrick  Alexander; Michael  O'Connor
- **Public source rows linked:** 244
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Patrick  Alexander; Michael  O'Connor (0184723) → Cold Spring Granite Company (L00067) → Agate Quarry (2100013)**

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

## Controller and operator valid-time history

- **Patrick  Alexander → Cold Spring Granite Company:** 1950-01-01 through 2024-05-20; derived from co-tenure at mine 2100013; source `msha-controller-operator-history`.
- **Michael  O'Connor → Cold Spring Granite Company:** 2024-05-21 through current/open; derived from co-tenure at mine 2100013; source `msha-controller-operator-history`.
- **Patrick  Alexander → Cold Spring Granite Company:** 2024-05-21 through current/open; derived from co-tenure at mine 2100013; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 6
- 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 — 0 since 2021:** Accidents and injuries 2 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 12 violation rows across the full record; 4 carry an S&S flag and $1,314 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 12 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 4 since 2021:** Inspections 25 inspection events and 259 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 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 62.130 — Permissible exposure level.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.130
- **30 CFR 56.9101 — Operating speeds and control of equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9101
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 47.51 — Requirement for an MSDS.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-F/section-47.51
- **30 CFR 62.120 — Action level.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120
- **30 CFR 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2000-05-11 through 2005-05-10; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2024-11-13 through 2024-11-13; source ID `msha-addresses`
- **Assessed Violations:** 12 rows; 2001-06-26 through 2024-11-13; source ID `msha-assessed-violations`
- **Conferences:** 2 rows; 2008-04-30 through 2008-04-30; source ID `msha-conferences`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 25 rows; 2000-04-19 through 2026-08-19; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 143 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 31 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:** 12 rows; 2005-04-05 through 2021-02-10; source ID `msha-personal-health-samples`
- **Violations:** 12 rows; 2001-06-26 through 2024-11-13; 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/agate-quarry-2100013`
- JSON: `/api/v1/mines/agate-quarry-2100013`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2100013/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2100013/relationships`
- MCP resource: `mine://2100013/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`