# DAYTON MATERIALS

- **MSHA mine ID:** 2602412
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Lyon, NV
- **Operator:** 3D Concrete llc
- **Controller:** Eagle Materials Inc
- **Public source rows linked:** 926
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Eagle Materials Inc (M00946) → 3D Concrete llc (0165953) → DAYTON MATERIALS (2602412)**

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

## Controller and operator valid-time history

- **Bing Construction Of Nevada  et al → Dayton Materials LLC:** 2000-03-01 through 2008-02-27; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **Wass Family Corp  et al → Dayton Materials LLC:** 2000-03-01 through 2008-02-27; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **Granite Construction Inc → Granite Construction Company:** 2008-02-28 through 2012-12-31; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **Shane N  Davis  et al → 3D Concrete:** 2013-01-01 through 2019-08-02; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **John W  Davis  et al → 3D Concrete:** 2013-01-01 through 2019-08-02; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **Eagle Materials Inc → 3D Concrete LLC:** 2019-08-03 through 2026-04-06; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **Granite Construction Inc → Granite Construction Company:** 2026-04-07 through 2026-04-07; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.
- **Eagle Materials Inc → 3D Concrete llc:** 2026-04-08 through current/open; derived from co-tenure at mine 2602412; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 18
- 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 — 7 since 2021:** Accidents and injuries 10 historical accident/injury rows; 0 coded fatalities and 383 lost days across the published record.
2. **COMPLIANCE — 81 since 2021:** Violations and penalties 177 violation rows across the full record; 40 carry an S&S flag and $62,583 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 14K employee hours and 24 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 100 linked rows:** Contests, conferences and decisions 35 contested-violation rows, 38 civil-penalty docket/decision rows, and 27 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 — 21 since 2021:** Inspections 77 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 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 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **30 CFR 56.23003 — Requirements for written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23003
- **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 56.14107 — Moving machine parts.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2003-12-09 through 2026-06-29; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-01-13 through 2013-01-13; source ID `msha-addresses`
- **Assessed Violations:** 174 rows; 2000-03-22 through 2025-11-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 38 rows; 2004-08-27 through 2026-09-15; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 27 rows; 2026-02-11 through 2026-02-11; source ID `msha-conferences`
- **Contested Violations:** 35 rows; 2010-04-29 through 2025-11-05; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 83 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 22 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 2000-03-01 through 2026-04-08; source ID `msha-controller-operator-history`
- **Inspections:** 77 rows; 2000-03-22 through 2026-10-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 206 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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; 2005-03-22 through 2018-11-06; source ID `msha-personal-health-samples`
- **Violations:** 177 rows; 2000-03-22 through 2026-08-18; 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/dayton-materials-2602412`
- JSON: `/api/v1/mines/dayton-materials-2602412`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2602412/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2602412/relationships`
- MCP resource: `mine://2602412/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`