# Northrup Quarry

- **MSHA mine ID:** 3609526
- **Status:** Abandoned
- **Type / commodity:** Surface / Dimension Slate
- **Location:** Bradford, PA
- **Operator:** Shawn Adams
- **Controller:** Shawn L  Adams
- **Public source rows linked:** 287
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Shawn L  Adams (0050471) → Shawn Adams (0060544) → Northrup Quarry (3609526)**

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

## Controller and operator valid-time history

- **Kenneth D  Shedden → Shedden Quarry:** 2007-05-31 through 2008-03-31; derived from co-tenure at mine 3609526; source `msha-controller-operator-history`.
- **Charles  God et al → T. G. Mountain Stone:** 2008-04-01 through 2013-09-24; derived from co-tenure at mine 3609526; source `msha-controller-operator-history`.
- **Jan  Tuttle et al → T. G. Mountain Stone:** 2008-04-01 through 2013-09-24; derived from co-tenure at mine 3609526; source `msha-controller-operator-history`.
- **Jan M  God → T. G. Mountain Stone:** 2013-09-25 through 2015-06-29; derived from co-tenure at mine 3609526; source `msha-controller-operator-history`.
- **Shawn L  Adams → Shawn Adams:** 2015-06-30 through current/open; derived from co-tenure at mine 3609526; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 12
- 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 1 historical accident/injury rows; 1 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 2 since 2021:** Violations and penalties 56 violation rows across the full record; 27 carry an S&S flag and $32,475 appears in current assessed amounts.
3. **HEALTH — 15 samples:** Occupational health samples 15 personal. 3 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 720 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 26 linked rows:** Contests, conferences and decisions 13 contested-violation rows, 13 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 — 3 since 2021:** Inspections 32 inspection events and 629 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 56.12028 — Testing grounding systems.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.12030 — Correction of dangerous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **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 56.5002 — Exposure monitoring.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5002
- **30 CFR 56.5001 — Exposure limits for airborne contaminants.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **30 CFR 62.120 — Action level.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2013-09-19 through 2013-09-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-06-03 through 2025-06-03; source ID `msha-addresses`
- **Assessed Violations:** 53 rows; 2007-05-31 through 2021-12-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 13 rows; 2011-09-07 through 2015-04-08; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 13 rows; 2010-05-11 through 2013-11-25; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 21 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 5 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2007-05-31 through 2015-06-30; source ID `msha-controller-operator-history`
- **Inspections:** 32 rows; 2007-05-30 through 2023-08-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 55 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 16 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:** 15 rows; 2010-05-18 through 2020-03-18; source ID `msha-personal-health-samples`
- **Violations:** 56 rows; 2007-05-31 through 2021-12-09; 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/northrup-quarry-3609526`
- JSON: `/api/v1/mines/northrup-quarry-3609526`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3609526/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3609526/relationships`
- MCP resource: `mine://3609526/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`