# Milner Pit

- **MSHA mine ID:** 0504641
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Routt, CO
- **Operator:** Oldcastle SW Group, Inc.
- **Controller:** CRH PLC
- **Public source rows linked:** 456
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Oldcastle SW Group, Inc. (L16678) → Milner Pit (0504641)**

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

## Controller and operator valid-time history

- **David S  Zehner → Precision Excavating, Inc.:** 1999-03-01 through 2024-05-22; derived from co-tenure at mine 0504641; source `msha-controller-operator-history`.
- **CRH PLC → Oldcastle SW Group, Inc.:** 2024-05-23 through current/open; derived from co-tenure at mine 0504641; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 5 historical accident/injury rows; 0 coded fatalities and 130 lost days across the published record.
2. **COMPLIANCE — 18 since 2021:** Violations and penalties 86 violation rows across the full record; 32 carry an S&S flag and $17,730 appears in current assessed amounts.
3. **HEALTH — 13 samples:** Occupational health samples 13 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 5K employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 7 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 7 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 — 7 since 2021:** Inspections 37 inspection events and 506 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 46.9 — Records of training.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **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 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **30 CFR 56.15003 — Protective footwear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15003
- **30 CFR 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **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
- **30 CFR 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2007-02-09 through 2018-05-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-04-22 through 2025-04-22; source ID `msha-addresses`
- **Assessed Violations:** 86 rows; 2002-05-07 through 2026-04-08; source ID `msha-assessed-violations`
- **Conferences:** 7 rows; 2008-06-11 through 2008-06-11; source ID `msha-conferences`
- **Controller and Operator History:** 2 rows; 1999-03-01 through 2024-05-23; source ID `msha-controller-operator-history`
- **Inspections:** 37 rows; 2000-06-14 through 2026-04-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 173 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 45 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:** 13 rows; 2002-05-08 through 2024-09-04; source ID `msha-personal-health-samples`
- **Violations:** 86 rows; 2002-05-07 through 2026-04-08; 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/milner-pit-0504641`
- JSON: `/api/v1/mines/milner-pit-0504641`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0504641/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0504641/relationships`
- MCP resource: `mine://0504641/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`