# MONA PIT

- **MSHA mine ID:** 4202212
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Juab, UT
- **Operator:** Kilgore Contracting
- **Controller:** Summit Materials LLC
- **Public source rows linked:** 528
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Summit Materials LLC (M02046) → Kilgore Contracting (L01838) → MONA PIT (4202212)**

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

## Controller and operator valid-time history

- **Cyrus W  Spurlino → Westroc, Inc.:** 1998-06-01 through 2013-03-31; derived from co-tenure at mine 4202212; source `msha-controller-operator-history`.
- **Harold  Elam → Kilgore Contracting:** 2013-04-01 through 2011-03-31; derived from co-tenure at mine 4202212; source `msha-controller-operator-history`.
- **Summit Materials LLC → Kilgore Contracting:** 2013-04-01 through current/open; derived from co-tenure at mine 4202212; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- Interval anomalies: 1
- 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 — 2 since 2021:** Accidents and injuries 7 historical accident/injury rows; 0 coded fatalities and 51 lost days across the published record.
2. **COMPLIANCE — 36 since 2021:** Violations and penalties 98 violation rows across the full record; 16 carry an S&S flag and $20,247 appears in current assessed amounts.
3. **HEALTH — 27 samples:** Occupational health samples 26 personal; 1 area. 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 8K employee hours and 14 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 — 15 since 2021:** Inspections 70 inspection events and 890 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 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **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
- **30 CFR 56.12068 — Locking transformer enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12068
- **30 CFR 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002
- **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 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2003-07-09 through 2024-07-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2014-11-06 through 2014-11-06; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2010-04-27 through 2010-04-27; source ID `msha-area-samples`
- **Assessed Violations:** 97 rows; 2000-04-12 through 2026-07-23; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2026-09-04 through 2026-09-04; source ID `msha-conferences`
- **Controller and Operator History:** 3 rows; 1998-06-01 through 2013-04-01; source ID `msha-controller-operator-history`
- **Inspections:** 70 rows; 2000-04-12 through 2026-07-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 177 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 46 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:** 26 rows; 2000-10-25 through 2025-04-23; source ID `msha-personal-health-samples`
- **Violations:** 98 rows; 2000-04-12 through 2026-07-23; 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/mona-pit-4202212`
- JSON: `/api/v1/mines/mona-pit-4202212`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4202212/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4202212/relationships`
- MCP resource: `mine://4202212/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`