# A B C Sand & Rock Inc

- **MSHA mine ID:** 0202357
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Maricopa, AZ
- **Operator:** A B C Sand & Rock Inc
- **Controller:** Sylvia  Waltemath
- **Public source rows linked:** 555
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Sylvia  Waltemath (0188581) → A B C Sand & Rock Inc (L30114) → A B C Sand & Rock Inc (0202357)**

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

## Controller and operator valid-time history

- **David  Waltemath → A B C Sand & Rock Inc:** 1987-02-01 through 2023-09-15; derived from co-tenure at mine 0202357; source `msha-controller-operator-history`.
- **Sylvia  Waltemath → A B C Sand & Rock Inc:** 2023-09-16 through current/open; derived from co-tenure at mine 0202357; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 11 since 2021:** Violations and penalties 87 violation rows across the full record; 9 carry an S&S flag and $12,837 appears in current assessed amounts.
3. **HEALTH — 18 samples:** Occupational health samples 18 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 12K employee hours and 22 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 31 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 17 civil-penalty docket/decision rows, and 10 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 — 13 since 2021:** Inspections 68 inspection events and 825 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 50.30-1 — General instructions for completing MSHA Form 7000-2.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30-1
- **30 CFR 56.20003 — Housekeeping.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **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 56.14107 — Moving machine parts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104

## Source coverage

- **Addresses of Record:** 1 rows; 1987-02-06 through 1987-02-06; source ID `msha-addresses`
- **Assessed Violations:** 83 rows; 2000-03-28 through 2024-12-18; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 17 rows; 2003-01-27 through 2011-11-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 10 rows; 2001-09-13 through 2001-09-13; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2010-04-16 through 2010-04-29; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 1987-02-01 through 1987-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 68 rows; 2000-03-27 through 2026-06-03; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 211 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 53 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:** 18 rows; 2003-06-17 through 2024-12-18; source ID `msha-personal-health-samples`
- **Violations:** 87 rows; 2000-03-28 through 2024-12-18; 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/a-b-c-sand-rock-inc-0202357`
- JSON: `/api/v1/mines/a-b-c-sand-rock-inc-0202357`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0202357/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0202357/relationships`
- MCP resource: `mine://0202357/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`