# Sun City Pit

- **MSHA mine ID:** 0201870
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Maricopa, AZ
- **Operator:** Aggregate Industries SWR, Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 1,125
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Aggregate Industries SWR, Inc. (L06525) → Sun City Pit (0201870)**

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

## Controller and operator valid-time history

- **William A  Walker → Sun Valley Crushing Company:** 1950-01-01 through 1986-01-15; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Larry  Walker et al → Sun State Rock & Materials Corp:** 1986-01-16 through 2006-10-06; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Deloris C  Walker et al → Sun State Rock & Materials Corp:** 1986-01-16 through 2006-10-06; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Lafarge S A → Lafarge North America Inc:** 2006-10-07 through 2015-07-09; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Holcim Ltd → Lafarge North America Inc:** 2015-07-10 through 2018-02-22; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Holcim Ltd → Aggregate Industries SWR, Inc.:** 2018-02-23 through 2025-06-22; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Holcim Ltd → Aggregate Industries SWR, Inc.:** 2018-02-23 through 2015-07-09; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Garth  Frehner → Aggregate Industries SWR, Inc.:** 2018-02-23 through 2004-05-09; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Aggregate Industries PLC → Aggregate Industries SWR, Inc.:** 2018-02-23 through 2009-04-29; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.
- **Amrize Ltd → Aggregate Industries SWR, Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 0201870; source `msha-controller-operator-history`.

- History rows: 10
- Typed edges: 23
- Interval anomalies: 3
- 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 19 historical accident/injury rows; 0 coded fatalities and 387 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 257 violation rows across the full record; 81 carry an S&S flag and $115,362 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 personal. 1 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 3K employee hours and 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 52 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 19 civil-penalty docket/decision rows, and 29 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 57 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 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **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 56.4201 — Inspection.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.12025 — Grounding circuit enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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 56.12004 — 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:** 19 rows; 2002-07-26 through 2019-06-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-01-28 through 2022-01-28; source ID `msha-addresses`
- **Assessed Violations:** 253 rows; 2000-03-29 through 2020-02-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 19 rows; 2004-04-07 through 2010-09-27; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 29 rows; 2000-04-04 through 2019-08-29; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2007-08-09 through 2009-04-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 205 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 58 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 10 rows; 1950-01-01 through 2018-02-23; source ID `msha-controller-operator-history`
- **Inspections:** 57 rows; 2000-03-27 through 2020-02-11; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 164 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 42 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:** 6 rows; 2009-04-02 through 2018-07-10; source ID `msha-personal-health-samples`
- **Violations:** 257 rows; 2000-03-29 through 2020-02-13; 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/sun-city-pit-0201870`
- JSON: `/api/v1/mines/sun-city-pit-0201870`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0201870/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0201870/relationships`
- MCP resource: `mine://0201870/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`