# PORTER MOORE PIT

- **MSHA mine ID:** 4102673
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** San Patricio, TX
- **Operator:** Martin Marietta Materials Southwest Ltd
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 59
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials Southwest Ltd (L16206) → PORTER MOORE PIT (4102673)**

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

## Controller and operator valid-time history

- **Basic Industries Inc → South Texas Construction Company:** 1950-01-01 through 1987-08-05; derived from co-tenure at mine 4102673; source `msha-controller-operator-history`.
- **Redland Plc → Redland Stone Products Company:** 1987-08-06 through 1998-02-10; derived from co-tenure at mine 4102673; source `msha-controller-operator-history`.
- **Lafarge S A → Redland Stone Products Company:** 1998-02-11 through 1998-12-16; derived from co-tenure at mine 4102673; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials Southwest Ltd:** 1998-12-17 through current/open; derived from co-tenure at mine 4102673; 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 — 0 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 7 violation rows across the full record; 3 carry an S&S flag and $992 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 1K employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 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 — 0 since 2021:** Inspections 4 inspection events and 32 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 56.4500 — Heat sources.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4500
- **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 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **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 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **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 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2001-02-01 through 2001-02-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2002-07-01 through 2002-07-01; source ID `msha-addresses`
- **Assessed Violations:** 7 rows; 2000-03-10 through 2000-12-05; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2000-03-21 through 2000-03-21; source ID `msha-conferences`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1998-12-17; source ID `msha-controller-operator-history`
- **Inspections:** 4 rows; 2000-03-10 through 2001-11-19; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 26 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 7 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 7 rows; 2000-03-10 through 2000-12-05; 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/porter-moore-pit-4102673`
- JSON: `/api/v1/mines/porter-moore-pit-4102673`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4102673/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4102673/relationships`
- MCP resource: `mine://4102673/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`