# Little Mountain

- **MSHA mine ID:** 4200400
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Box Elder, UT
- **Operator:** Kilgore Contracting
- **Controller:** Summit Materials LLC
- **Public source rows linked:** 712
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Summit Materials LLC (M02046) → Kilgore Contracting (L01838) → Little Mountain (4200400)**

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

## Controller and operator valid-time history

- **Dan R  Fogle → Salt Lake Valley Sand & Gravel Company:** 1950-01-01 through 1993-05-27; derived from co-tenure at mine 4200400; source `msha-controller-operator-history`.
- **Dave  Balls et al → Salt Lake Valley Sand & Gravel:** 1993-05-28 through 2011-06-08; derived from co-tenure at mine 4200400; source `msha-controller-operator-history`.
- **Brent  Baker et  al → Salt Lake Valley Sand & Gravel:** 1993-05-28 through 2011-06-08; derived from co-tenure at mine 4200400; source `msha-controller-operator-history`.
- **Harold  Elam → Kilgore Contracting:** 2011-06-09 through 2011-03-31; derived from co-tenure at mine 4200400; source `msha-controller-operator-history`.
- **Summit Materials LLC → Kilgore Contracting:** 2011-06-09 through current/open; derived from co-tenure at mine 4200400; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 12
- Interval anomalies: 1
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 1 since 2021:** Accidents and injuries 7 historical accident/injury rows; 0 coded fatalities and 122 lost days across the published record.
2. **COMPLIANCE — 37 since 2021:** Violations and penalties 230 violation rows across the full record; 69 carry an S&S flag and $86,097 appears in current assessed amounts.
3. **HEALTH — 29 samples:** Occupational health samples 29 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 16K employee hours and 31 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 30 linked rows:** Contests, conferences and decisions 13 contested-violation rows, 13 civil-penalty docket/decision rows, and 4 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 18 since 2021:** Inspections 88 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 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.15004 — Eye protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15004
- **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 56.14207 — 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 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 50.10 — Immediate notification.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-B/section-50.10
- **30 CFR 46.11 — Site-specific hazard awareness training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.11
- **30 CFR 56.14131 — Seat belts for haulage trucks.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14131

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2001-11-08 through 2022-12-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-12-18 through 2025-12-18; source ID `msha-addresses`
- **Assessed Violations:** 227 rows; 2000-03-28 through 2026-03-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 13 rows; 2012-01-26 through 2023-09-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2001-12-05 through 2026-09-04; source ID `msha-conferences`
- **Contested Violations:** 13 rows; 2011-05-23 through 2023-01-23; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 15 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 6 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2011-06-09; source ID `msha-controller-operator-history`
- **Inspections:** 88 rows; 2000-03-28 through 2026-03-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 49 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:** 29 rows; 2001-07-03 through 2022-09-22; source ID `msha-personal-health-samples`
- **Violations:** 230 rows; 2000-03-28 through 2026-03-10; 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/little-mountain-4200400`
- JSON: `/api/v1/mines/little-mountain-4200400`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4200400/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4200400/relationships`
- MCP resource: `mine://4200400/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`