# MIDDLEPORT MATERIALS INC.

- **MSHA mine ID:** 3607480
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Schuylkill, PA
- **Operator:** Richard E. Pierson Materials Corp.
- **Controller:** Richard E  Pierson
- **Public source rows linked:** 1,075
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Richard E  Pierson (M08900) → Richard E. Pierson Materials Corp. (L11508) → MIDDLEPORT MATERIALS INC. (3607480)**

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

## Controller and operator valid-time history

- **Joseph  Walacavage → Middleport Materials Inc:** 1983-07-01 through 1993-09-28; derived from co-tenure at mine 3607480; source `msha-controller-operator-history`.
- **Brian L  Carpenter → Middleport Materials, Inc.:** 1993-09-29 through 2009-12-07; derived from co-tenure at mine 3607480; source `msha-controller-operator-history`.
- **Richard E  Pierson → Richard E. Pierson Construction Co., Inc.:** 2009-12-08 through 2014-06-30; derived from co-tenure at mine 3607480; source `msha-controller-operator-history`.
- **Richard E  Pierson → Richard E. Pierson Materials Corp.:** 2014-07-01 through current/open; derived from co-tenure at mine 3607480; source `msha-controller-operator-history`.

- History rows: 4
- 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 — 1 since 2021:** Accidents and injuries 18 historical accident/injury rows; 0 coded fatalities and 333 lost days across the published record.
2. **COMPLIANCE — 30 since 2021:** Violations and penalties 122 violation rows across the full record; 24 carry an S&S flag and $16,700 appears in current assessed amounts.
3. **HEALTH — 19 samples:** Occupational health samples 19 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 6K employee hours and 13 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 88 linked rows:** Contests, conferences and decisions 44 contested-violation rows, 44 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 21 since 2021:** Inspections 64 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 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **30 CFR 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.17001 — Illumination of surface working areas.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.14109 — Unguarded conveyors with adjacent travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14109
- **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 56.14107 — Moving machine parts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 18 rows; 2001-06-27 through 2022-02-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2017-08-28 through 2017-08-28; source ID `msha-addresses`
- **Assessed Violations:** 122 rows; 2000-05-16 through 2026-06-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 44 rows; 2011-10-12 through 2024-07-22; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 44 rows; 2010-07-30 through 2022-11-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 302 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 68 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1983-07-01 through 2014-07-01; source ID `msha-controller-operator-history`
- **Inspections:** 64 rows; 2000-05-16 through 2026-06-08; 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:** 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:** 19 rows; 2003-07-10 through 2026-06-09; source ID `msha-personal-health-samples`
- **Violations:** 122 rows; 2000-05-16 through 2026-06-08; 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/middleport-materials-inc-3607480`
- JSON: `/api/v1/mines/middleport-materials-inc-3607480`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3607480/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3607480/relationships`
- MCP resource: `mine://3607480/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`