# Silver Lake West Sand

- **MSHA mine ID:** 1401702
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Shawnee, KS
- **Operator:** Martin Marietta Materials, Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 408
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials, Inc. (L16197) → Silver Lake West Sand (1401702)**

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

## Controller and operator valid-time history

- **Larry D  Marney  et al → Builders Choice Aggregates:** 2009-04-27 through 2014-10-02; derived from co-tenure at mine 1401702; source `msha-controller-operator-history`.
- **Joseph D  Marney  et al → Builders Choice Aggregates:** 2009-04-27 through 2014-10-02; derived from co-tenure at mine 1401702; source `msha-controller-operator-history`.
- **Summit Materials LLC → Builders Choice Aggregates:** 2014-10-03 through 2022-03-31; derived from co-tenure at mine 1401702; source `msha-controller-operator-history`.
- **Summit Materials LLC et al → Builders Choice Aggregates:** 2022-04-01 through 2026-03-22; derived from co-tenure at mine 1401702; source `msha-controller-operator-history`.
- **N R Hamm et al → Builders Choice Aggregates:** 2022-04-01 through 2026-03-22; derived from co-tenure at mine 1401702; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials, Inc.:** 2026-03-23 through current/open; derived from co-tenure at mine 1401702; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 12
- 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 — 3 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 13 since 2021:** Violations and penalties 58 violation rows across the full record; 9 carry an S&S flag and $10,597 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 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 4K employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 0 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 — 15 since 2021:** Inspections 43 inspection events and 334 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 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.12032 — 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 56.12028 — 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 56.16005 — 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 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **30 CFR 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2022-09-26 through 2026-07-08; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-11-01 through 2011-11-01; source ID `msha-addresses`
- **Assessed Violations:** 58 rows; 2009-07-14 through 2025-10-02; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2018-01-16 through 2020-02-05; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 3 rows; 2017-07-24 through 2018-12-03; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 41 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 11 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 2009-04-27 through 2026-03-23; source ID `msha-controller-operator-history`
- **Inspections:** 43 rows; 2009-07-14 through 2026-04-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 138 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 36 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; 2011-09-22 through 2024-09-12; source ID `msha-personal-health-samples`
- **Violations:** 58 rows; 2009-07-14 through 2025-10-02; 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/silver-lake-west-sand-1401702`
- JSON: `/api/v1/mines/silver-lake-west-sand-1401702`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1401702/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1401702/relationships`
- MCP resource: `mine://1401702/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`