# Deep Creek Quarry

- **MSHA mine ID:** 1800517
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Garrett, MD
- **Operator:** Keystone Lime Company Inc
- **Controller:** Kendra K Folk; Melinda F Gibson; Beverly A Critchfield
- **Public source rows linked:** 726
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Kendra K Folk; Melinda F Gibson; Beverly A Critchfield (0195422) → Keystone Lime Company Inc (L01108) → Deep Creek Quarry (1800517)**

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

## Controller and operator valid-time history

- **Louise Peters  Friend → Gaylord Fuel Corp:** 1950-01-01 through 1994-12-21; derived from co-tenure at mine 1800517; source `msha-controller-operator-history`.
- **James  Browning → Deep Creek Quarry Llc:** 1994-12-22 through 2001-02-19; derived from co-tenure at mine 1800517; source `msha-controller-operator-history`.
- **Mark  Folk → Keystone Lime Company Inc:** 2001-02-20 through 2025-08-14; derived from co-tenure at mine 1800517; source `msha-controller-operator-history`.
- **Melinda F Gibson et al → Keystone Lime Company Inc:** 2025-08-15 through current/open; derived from co-tenure at mine 1800517; source `msha-controller-operator-history`.
- **Kendra K Folk et al → Keystone Lime Company Inc:** 2025-08-15 through current/open; derived from co-tenure at mine 1800517; source `msha-controller-operator-history`.
- **Beverly A Critchfield et al → Keystone Lime Company Inc:** 2025-08-15 through current/open; derived from co-tenure at mine 1800517; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 13
- 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 5 historical accident/injury rows; 0 coded fatalities and 89 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 92 violation rows across the full record; 17 carry an S&S flag and $22,125 appears in current assessed amounts.
3. **HEALTH — 24 samples:** Occupational health samples 24 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 — 49 linked rows:** Contests, conferences and decisions 18 contested-violation rows, 19 civil-penalty docket/decision rows, and 12 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 — 0 since 2021:** Inspections 37 inspection events and 820 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 56.1000 — 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
- **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 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **30 CFR 56.12020 — Protection of persons at switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12020
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **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 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:** 5 rows; 2002-09-16 through 2010-11-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2014-04-23 through 2014-04-23; source ID `msha-addresses`
- **Assessed Violations:** 92 rows; 2000-03-08 through 2014-04-23; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 19 rows; 2001-06-21 through 2013-05-31; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 12 rows; 2001-11-14 through 2008-03-28; source ID `msha-conferences`
- **Contested Violations:** 18 rows; 2008-01-18 through 2012-04-26; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 186 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 43 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2001-02-20; source ID `msha-controller-operator-history`
- **Inspections:** 37 rows; 2000-03-08 through 2014-04-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 153 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 37 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:** 24 rows; 2002-09-04 through 2012-04-26; source ID `msha-personal-health-samples`
- **Violations:** 92 rows; 2000-03-08 through 2014-04-23; 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/deep-creek-quarry-1800517`
- JSON: `/api/v1/mines/deep-creek-quarry-1800517`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1800517/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1800517/relationships`
- MCP resource: `mine://1800517/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`