# PLANT #102

- **MSHA mine ID:** 2002820
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Kalamazoo, MI
- **Operator:** Aggregate Resources, Inc.
- **Controller:** Daniel R  Balkema; Ralph T  Balkema
- **Public source rows linked:** 238
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Daniel R  Balkema; Ralph T  Balkema (M09473) → Aggregate Resources, Inc. (0050134) → PLANT #102 (2002820)**

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

## Controller and operator valid-time history

- **Gary  Moline  et al → Cole Brothers Contractors Inc:** 1988-11-01 through 2002-01-01; derived from co-tenure at mine 2002820; source `msha-controller-operator-history`.
- **Ralph T  Balkema et al → Aggregate Resources, Inc.:** 2002-01-02 through current/open; derived from co-tenure at mine 2002820; source `msha-controller-operator-history`.
- **Daniel R  Balkema et al → Aggregate Resources, Inc.:** 2002-01-02 through current/open; derived from co-tenure at mine 2002820; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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 4 historical accident/injury rows; 0 coded fatalities and 24 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 25 violation rows across the full record; 1 carry an S&S flag and $2,217 appears in current assessed amounts.
3. **HEALTH — 8 samples:** Occupational health samples 8 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 261 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 4 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 — 6 since 2021:** Inspections 32 inspection events and 340 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 56.13017 — Compressor discharge pipes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13017
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **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
- **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
- **30 CFR 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 46.4 — Training plan implementation.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.4
- **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 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **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 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2003-10-24 through 2024-09-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1990-03-28 through 1990-03-28; source ID `msha-addresses`
- **Assessed Violations:** 25 rows; 2000-09-26 through 2017-06-05; source ID `msha-assessed-violations`
- **Conferences:** 4 rows; 2003-10-01 through 2006-11-29; source ID `msha-conferences`
- **Controller and Operator History:** 3 rows; 1988-11-01 through 2002-01-02; source ID `msha-controller-operator-history`
- **Inspections:** 32 rows; 2000-09-26 through 2026-03-18; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 107 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 28 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:** 8 rows; 2011-05-17 through 2025-08-07; source ID `msha-personal-health-samples`
- **Violations:** 25 rows; 2000-09-26 through 2017-06-05; 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/plant-102-2002820`
- JSON: `/api/v1/mines/plant-102-2002820`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2002820/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2002820/relationships`
- MCP resource: `mine://2002820/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`