# Montgomery Stone

- **MSHA mine ID:** 1500069
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Montgomery, KY
- **Operator:** Walker Construction & Materials, LLC
- **Controller:** Steve  Lawson; Adam  Lawson
- **Public source rows linked:** 674
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Steve  Lawson; Adam  Lawson (0132261) → Walker Construction & Materials, LLC (0166853) → Montgomery Stone (1500069)**

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

## Controller and operator valid-time history

- **Arthur E  Walker Jr → Walker Company of Kentucky,  Inc.:** 1950-01-01 through 2019-10-15; derived from co-tenure at mine 1500069; source `msha-controller-operator-history`.
- **Adam  Lawson et al → Walker Construction & Materials, LLC:** 2019-10-16 through current/open; derived from co-tenure at mine 1500069; source `msha-controller-operator-history`.
- **Steve  Lawson et al → Walker Construction & Materials, LLC:** 2019-10-16 through current/open; derived from co-tenure at mine 1500069; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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 9 historical accident/injury rows; 0 coded fatalities and 256 lost days across the published record.
2. **COMPLIANCE — 18 since 2021:** Violations and penalties 132 violation rows across the full record; 34 carry an S&S flag and $23,363 appears in current assessed amounts.
3. **HEALTH — 39 samples:** Occupational health samples 39 personal. 1 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 7K employee hours and 14 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 0 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 — 13 since 2021:** Inspections 84 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 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.4230 — Self-propelled equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4230
- **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 56.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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 56.3200 — Correction of hazardous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3200
- **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 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207

## Source coverage

- **Accident, Injuries, and Illnesses:** 9 rows; 2001-10-30 through 2014-05-14; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1990-06-04 through 1990-06-04; source ID `msha-addresses`
- **Assessed Violations:** 132 rows; 2000-09-14 through 2026-06-30; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2006-09-28 through 2017-03-29; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 3 rows; 2005-12-19 through 2016-09-27; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2019-10-16; source ID `msha-controller-operator-history`
- **Inspections:** 84 rows; 2000-01-26 through 2026-07-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 213 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 39 rows; 2001-08-13 through 2026-07-15; source ID `msha-personal-health-samples`
- **Violations:** 132 rows; 2000-09-14 through 2026-06-30; 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/montgomery-stone-1500069`
- JSON: `/api/v1/mines/montgomery-stone-1500069`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1500069/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1500069/relationships`
- MCP resource: `mine://1500069/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`