# Ottawa Plant

- **MSHA mine ID:** 1101013
- **Status:** Active
- **Type / commodity:** Surface / Ground Silica
- **Location:** La Salle, IL
- **Operator:** U. S. Silica Company
- **Controller:** USS Holdings Inc
- **Public source rows linked:** 5,643
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**USS Holdings Inc (M11007) → U. S. Silica Company (L14417) → Ottawa Plant (1101013)**

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

## Controller and operator valid-time history

- **Ottawa Silica Company → Ottawa Industrial Sand Company:** 1950-01-01 through 1986-12-31; derived from co-tenure at mine 1101013; source `msha-controller-operator-history`.
- **Rio Tinto Group → U S Silica Company:** 1987-01-01 through 1996-03-08; derived from co-tenure at mine 1101013; source `msha-controller-operator-history`.
- **USS Holdings Inc → U. S. Silica Company:** 1996-03-09 through current/open; derived from co-tenure at mine 1101013; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 — 17 since 2021:** Accidents and injuries 114 historical accident/injury rows; 1 coded fatalities and 4,639 lost days across the published record.
2. **COMPLIANCE — 241 since 2021:** Violations and penalties 765 violation rows across the full record; 95 carry an S&S flag and $243,857 appears in current assessed amounts.
3. **HEALTH — 183 samples:** Occupational health samples 172 personal; 11 area. 20 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 66K employee hours and 122 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 401 linked rows:** Contests, conferences and decisions 188 contested-violation rows, 189 civil-penalty docket/decision rows, and 24 conference records linked by issuance number.
6. **CONTRACTORS — 31 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 — 35 since 2021:** Inspections 166 inspection events and 5K 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 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 56.12032 — 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 56.11002 — 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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.16001 — Stacking and storage of materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16001
- **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
- **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 56.16009 — Suspended loads.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16009
- **30 CFR 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104

## Source coverage

- **Accident, Injuries, and Illnesses:** 114 rows; 2000-02-18 through 2026-08-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1973-11-29 through 1973-11-29; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 11 rows; 2012-12-20 through 2016-08-09; source ID `msha-area-samples`
- **Assessed Violations:** 760 rows; 2000-01-05 through 2026-04-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 189 rows; 2003-11-06 through 2026-03-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 24 rows; 2003-03-03 through 2026-06-03; source ID `msha-conferences`
- **Contested Violations:** 188 rows; 2007-03-13 through 2025-10-23; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,315 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 535 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1996-03-09; source ID `msha-controller-operator-history`
- **Inspections:** 166 rows; 2000-01-04 through 2026-07-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 318 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 81 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:** 172 rows; 2000-11-21 through 2025-10-23; source ID `msha-personal-health-samples`
- **Violations:** 765 rows; 2000-01-05 through 2026-04-09; 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/ottawa-plant-1101013`
- JSON: `/api/v1/mines/ottawa-plant-1101013`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1101013/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1101013/relationships`
- MCP resource: `mine://1101013/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`