# PLANT #5

- **MSHA mine ID:** 1302087
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Adair, IA
- **Operator:** Schildberg Construction Company Inc
- **Controller:** Mark  Schildberg
- **Public source rows linked:** 59
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Mark  Schildberg (M00097) → Schildberg Construction Company Inc (L00140) → PLANT #5 (1302087)**

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

## Controller and operator valid-time history

- **Gendler Stone Products Company Inc → Gendler Stone Products Company Inc:** 1985-07-01 through 1986-01-05; derived from co-tenure at mine 1302087; source `msha-controller-operator-history`.
- **Mark  Schildberg et al → Schildberg Construction Company Inc:** 1986-01-06 through current/open; derived from co-tenure at mine 1302087; 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 — 0 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 2 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 4 violation rows across the full record; 1 carry an S&S flag and $1,768 appears in current assessed amounts.
3. **HEALTH — 4 samples:** Occupational health samples 4 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 11K employee hours and 19 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 7 inspection events and 90 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 56.6306 — Loading, blasting, and security.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-E/section-56.6306
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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 56.12016 — Work on electrically-powered equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12016

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2000-02-09 through 2003-01-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2003-03-28 through 2003-03-28; source ID `msha-addresses`
- **Assessed Violations:** 4 rows; 2001-02-13 through 2003-03-12; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2003-03-20 through 2003-03-20; source ID `msha-conferences`
- **Controller and Operator History:** 2 rows; 1985-07-01 through 1986-01-06; source ID `msha-controller-operator-history`
- **Inspections:** 7 rows; 2000-01-20 through 2003-03-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 8 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:** 4 rows; 2003-03-12 through 2003-03-12; source ID `msha-personal-health-samples`
- **Violations:** 4 rows; 2001-02-13 through 2003-03-12; 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-5-1302087`
- JSON: `/api/v1/mines/plant-5-1302087`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1302087/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1302087/relationships`
- MCP resource: `mine://1302087/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`