# Haydite Mine

- **MSHA mine ID:** 3300490
- **Status:** Abandoned
- **Type / commodity:** Surface / Common Shale
- **Location:** Cuyahoga, OH
- **Operator:** DiGeronimo Aggregates LLC
- **Controller:** Vic  DiGeronimo Jr
- **Public source rows linked:** 1,283
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vic  DiGeronimo Jr (0040973) → DiGeronimo Aggregates LLC (0055136) → Haydite Mine (3300490)**

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

## Controller and operator valid-time history

- **St Louis Steel Casting Inc → Hydraulic Press Brick Company:** 1950-01-01 through 2000-08-24; derived from co-tenure at mine 3300490; source `msha-controller-operator-history`.
- **Schwarz Partners II LP → Hydraulic Press Brick Company:** 2000-08-25 through 2004-10-12; derived from co-tenure at mine 3300490; source `msha-controller-operator-history`.
- **Vic  DiGeronimo Jr et al → DiGeronimo Aggregates LLC:** 2004-10-13 through current/open; derived from co-tenure at mine 3300490; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- 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 35 historical accident/injury rows; 0 coded fatalities and 700 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 293 violation rows across the full record; 99 carry an S&S flag and $74,234 appears in current assessed amounts.
3. **HEALTH — 127 samples:** Occupational health samples 127 personal. 2 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 23 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 52 linked rows:** Contests, conferences and decisions 23 contested-violation rows, 27 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 80 inspection events and 2K 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 56.14112 — Construction and maintenance of guards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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
- **30 CFR 56.4203 — Extinguisher recharging or replacement.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4203
- **30 CFR 56.14109 — Unguarded conveyors with adjacent travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14109
- **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 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.17001 — Illumination of surface working areas.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **30 CFR 56.14201 — Conveyor start-up warnings.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14201
- **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 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103

## Source coverage

- **Accident, Injuries, and Illnesses:** 35 rows; 2000-01-21 through 2014-03-21; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2018-12-31 through 2018-12-31; source ID `msha-addresses`
- **Assessed Violations:** 293 rows; 2000-01-11 through 2018-11-07; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 27 rows; 2000-10-24 through 2017-08-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2012-07-13 through 2012-07-13; source ID `msha-conferences`
- **Contested Violations:** 23 rows; 2012-03-26 through 2016-11-15; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 98 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 22 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2004-10-13; source ID `msha-controller-operator-history`
- **Inspections:** 80 rows; 2000-01-10 through 2018-11-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 228 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 50 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:** 127 rows; 2001-08-14 through 2018-06-19; source ID `msha-personal-health-samples`
- **Violations:** 293 rows; 2000-01-11 through 2018-11-07; 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/haydite-mine-3300490`
- JSON: `/api/v1/mines/haydite-mine-3300490`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3300490/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3300490/relationships`
- MCP resource: `mine://3300490/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`