# Porter Plant & Pit

- **MSHA mine ID:** 4103197
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Montgomery, TX
- **Operator:** Viking Aggregates
- **Controller:** Rasmussen Group Inc
- **Public source rows linked:** 617
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Rasmussen Group Inc (M12677) → Viking Aggregates (L12248) → Porter Plant & Pit (4103197)**

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

## Controller and operator valid-time history

- **Hallett Construction Company → Hallett Construction Company:** 1983-09-01 through 1986-10-13; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.
- **Mid America Materials Company → Hallett Materials:** 1986-10-14 through 1999-03-31; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.
- **Rasmussen Group Inc → Hallett Materials:** 1999-04-01 through 2001-08-10; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.
- **CRH PLC → Hallett Materials:** 2001-08-11 through 2001-08-10; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.
- **Rasmussen Group Inc → Hallett Materials:** 2001-08-11 through 2025-10-26; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.
- **Johnson Holding Company → Viking Aggregates:** 2025-10-27 through 2024-04-18; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.
- **Rasmussen Group Inc → Viking Aggregates:** 2025-10-27 through current/open; derived from co-tenure at mine 4103197; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 19
- Interval anomalies: 2
- 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 — 3 since 2021:** Accidents and injuries 5 historical accident/injury rows; 0 coded fatalities and 269 lost days across the published record.
2. **COMPLIANCE — 44 since 2021:** Violations and penalties 121 violation rows across the full record; 31 carry an S&S flag and $35,091 appears in current assessed amounts.
3. **HEALTH — 25 samples:** Occupational health samples 25 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 15K employee hours and 22 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 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 — 16 since 2021:** Inspections 69 inspection events and 961 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 56.11001 — 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 47.41 — Requirement for container labels.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **30 CFR 56.4201 — Inspection.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 56.14200 — Warnings prior to starting or moving equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14200
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2000-12-04 through 2024-11-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1983-12-01 through 1983-12-01; source ID `msha-addresses`
- **Assessed Violations:** 120 rows; 2001-07-31 through 2026-07-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2016-03-31 through 2016-03-31; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2015-10-06 through 2015-10-06; source ID `msha-contested-violations`
- **Controller and Operator History:** 7 rows; 1983-09-01 through 2025-10-27; source ID `msha-controller-operator-history`
- **Inspections:** 69 rows; 2000-03-07 through 2026-07-14; 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:** 25 rows; 2004-01-13 through 2025-11-18; source ID `msha-personal-health-samples`
- **Violations:** 121 rows; 2001-07-31 through 2026-07-15; 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-plant-pit-4103197`
- JSON: `/api/v1/mines/porter-plant-pit-4103197`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4103197/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4103197/relationships`
- MCP resource: `mine://4103197/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`