# Plant #8

- **MSHA mine ID:** 1302178
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Adair, IA
- **Operator:** Schildberg Construction Company Inc
- **Controller:** Mark  Schildberg
- **Public source rows linked:** 905
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Mark  Schildberg (M00097) → Schildberg Construction Company Inc (L00140) → Plant #8 (1302178)**

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

## Controller and operator valid-time history

- **Richard R  Davidson  et al → Consumer Limestone Products Company:** 1990-08-01 through 1995-03-31; derived from co-tenure at mine 1302178; source `msha-controller-operator-history`.
- **Mark  Schildberg et al → Schildberg Construction Company Inc:** 1995-04-01 through current/open; derived from co-tenure at mine 1302178; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 1 since 2021:** Accidents and injuries 10 historical accident/injury rows; 0 coded fatalities and 59 lost days across the published record.
2. **COMPLIANCE — 10 since 2021:** Violations and penalties 112 violation rows across the full record; 22 carry an S&S flag and $28,177 appears in current assessed amounts.
3. **HEALTH — 63 samples:** Occupational health samples 63 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 11K employee hours and 16 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 2 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 — 13 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 56.14107 — Moving machine parts.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 47.44 — Temporary, portable containers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **30 CFR 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **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
- **30 CFR 56.6202 — Vehicles.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-E/section-56.6202
- **30 CFR 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **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 56.14211 — Blocking equipment in a raised position.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14211
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2000-01-24 through 2023-08-21; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2002-10-25 through 2002-10-25; source ID `msha-addresses`
- **Assessed Violations:** 112 rows; 2001-07-18 through 2025-06-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2016-12-07 through 2016-12-07; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2005-02-04 through 2024-03-14; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2016-07-07 through 2016-07-07; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 367 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 87 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1990-08-01 through 1995-04-01; source ID `msha-controller-operator-history`
- **Inspections:** 64 rows; 2000-09-21 through 2026-05-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 27 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 55 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:** 63 rows; 2003-03-11 through 2025-12-10; source ID `msha-personal-health-samples`
- **Violations:** 112 rows; 2001-07-18 through 2025-06-11; 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/plant-8-1302178`
- JSON: `/api/v1/mines/plant-8-1302178`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1302178/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1302178/relationships`
- MCP resource: `mine://1302178/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`