# El Jay Double Cone #2

- **MSHA mine ID:** 0501016
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Montezuma, CO
- **Operator:** Skanska USA Civil West RMD
- **Controller:** Skanska AB
- **Public source rows linked:** 181
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Skanska AB (M13157) → Skanska USA Civil West RMD (L18566) → El Jay Double Cone #2 (0501016)**

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

## Controller and operator valid-time history

- **Ashland Inc → Nielsons Inc:** 1950-01-01 through 1980-03-24; derived from co-tenure at mine 0501016; source `msha-controller-operator-history`.
- **Nielsons Holding Company → Nielsons Inc:** 1980-03-25 through 1995-09-04; derived from co-tenure at mine 0501016; source `msha-controller-operator-history`.
- **Hanson PLC → Nielsons Inc:** 1995-09-05 through 1998-04-07; derived from co-tenure at mine 0501016; source `msha-controller-operator-history`.
- **Skanska AB → Nielsons Inc:** 1998-04-08 through 2008-03-31; derived from co-tenure at mine 0501016; source `msha-controller-operator-history`.
- **Skanska AB → Skanska USA Civil West RMD:** 2008-04-01 through current/open; derived from co-tenure at mine 0501016; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 15
- 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 — 0 since 2021:** Violations and penalties 37 violation rows across the full record; 12 carry an S&S flag and $4,550 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 11 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 2K employee hours and 5 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 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 — 0 since 2021:** Inspections 22 inspection events and 280 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 56.4101 — Warning signs.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **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 56.14100 — 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 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **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 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
- **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 56.14112 — 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 56.12004 — 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

- **Addresses of Record:** 1 rows; 2014-11-13 through 2014-11-13; source ID `msha-addresses`
- **Assessed Violations:** 37 rows; 2000-06-20 through 2013-10-22; source ID `msha-assessed-violations`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2008-04-01; source ID `msha-controller-operator-history`
- **Inspections:** 22 rows; 2000-02-02 through 2014-04-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 53 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 14 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:** 11 rows; 2002-05-08 through 2011-04-20; source ID `msha-personal-health-samples`
- **Violations:** 37 rows; 2000-06-20 through 2013-10-22; 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/el-jay-double-cone-2-0501016`
- JSON: `/api/v1/mines/el-jay-double-cone-2-0501016`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0501016/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0501016/relationships`
- MCP resource: `mine://0501016/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`