# Northridge Sand LLC

- **MSHA mine ID:** 1401499
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Sedgwick, KS
- **Operator:** Northridge Sand LLC
- **Controller:** Burnette  Dirks; Byron  Dirks
- **Public source rows linked:** 625
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Burnette  Dirks; Byron  Dirks (M13032) → Northridge Sand LLC (L17093) → Northridge Sand LLC (1401499)**

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

## Controller and operator valid-time history

- **L A  Knebler → L A Knebler Construction Company Inc:** 1986-06-01 through 1997-03-13; derived from co-tenure at mine 1401499; source `msha-controller-operator-history`.
- **Superfos America Inc → Couch Construction Materials:** 1997-03-14 through 2000-01-12; derived from co-tenure at mine 1401499; source `msha-controller-operator-history`.
- **Burnette  Dirks  et al → Northridge Sand LLC:** 2000-01-13 through current/open; derived from co-tenure at mine 1401499; source `msha-controller-operator-history`.
- **Byron  Dirks et al → Northridge Sand LLC:** 2000-01-13 through current/open; derived from co-tenure at mine 1401499; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 29 since 2021:** Violations and penalties 125 violation rows across the full record; 21 carry an S&S flag and $29,402 appears in current assessed amounts.
3. **HEALTH — 21 samples:** Occupational health samples 21 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 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 8 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 2 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 66 inspection events and 724 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 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 56.12028 — Testing grounding systems.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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 56.12002 — 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 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402
- **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 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2009-06-19 through 2009-06-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2015-02-17 through 2015-02-17; source ID `msha-addresses`
- **Assessed Violations:** 123 rows; 2000-01-13 through 2026-07-27; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2018-08-29 through 2018-08-29; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2000-10-10 through 2021-03-15; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2018-05-16 through 2018-05-16; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Controller and Operator History:** 4 rows; 1986-06-01 through 2000-01-13; source ID `msha-controller-operator-history`
- **Inspections:** 66 rows; 2000-01-13 through 2026-08-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 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:** 21 rows; 2003-07-22 through 2026-07-27; source ID `msha-personal-health-samples`
- **Violations:** 125 rows; 2000-01-13 through 2026-07-27; 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/northridge-sand-llc-1401499`
- JSON: `/api/v1/mines/northridge-sand-llc-1401499`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1401499/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1401499/relationships`
- MCP resource: `mine://1401499/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`