# Rivergate

- **MSHA mine ID:** 3503659
- **Status:** Active
- **Type / commodity:** Facility / Lime
- **Location:** Multnomah, OR
- **Operator:** Gilmour and Company
- **Controller:** Ridgely H  Gilmour; Mark A  Gilmour
- **Public source rows linked:** 748
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Ridgely H  Gilmour; Mark A  Gilmour (0065731) → Gilmour and Company (0078223) → Rivergate (3503659)**

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

## Controller and operator valid-time history

- **Ridgely H  Gilmour et al → Gilmour and Company:** 2007-01-24 through 2008-02-27; derived from co-tenure at mine 3503659; source `msha-controller-operator-history`.
- **Mark A  Gilmour et al → Gilmour and Company:** 2007-01-24 through 2008-02-27; derived from co-tenure at mine 3503659; source `msha-controller-operator-history`.
- **Graymont Ltd → Graymont Western US Inc:** 2008-02-28 through 2009-08-24; derived from co-tenure at mine 3503659; source `msha-controller-operator-history`.
- **Ridgely H  Gilmour et al → Gilmour and Company:** 2009-08-25 through current/open; derived from co-tenure at mine 3503659; source `msha-controller-operator-history`.
- **Mark A  Gilmour et al → Gilmour and Company:** 2009-08-25 through current/open; derived from co-tenure at mine 3503659; source `msha-controller-operator-history`.

- History rows: 5
- 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 — 1 since 2021:** Accidents and injuries 15 historical accident/injury rows; 0 coded fatalities and 262 lost days across the published record.
2. **COMPLIANCE — 29 since 2021:** Violations and penalties 126 violation rows across the full record; 19 carry an S&S flag and $19,281 appears in current assessed amounts.
3. **HEALTH — 52 samples:** Occupational health samples 52 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 3K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 2 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 — 19 since 2021:** Inspections 63 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 56.20003 — 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 56.12004 — 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 56.14107 — 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 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.20001 — Intoxicating beverages and narcotics.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20001
- **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 56.14112 — Construction and maintenance of guards.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 15 rows; 2007-03-22 through 2024-09-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2007-01-25 through 2007-01-25; source ID `msha-addresses`
- **Assessed Violations:** 125 rows; 2007-01-25 through 2026-08-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2012-07-06 through 2012-07-06; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2011-06-16 through 2019-09-23; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2011-03-30 through 2011-03-30; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 188 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 42 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2007-01-24 through 2009-08-25; source ID `msha-controller-operator-history`
- **Inspections:** 63 rows; 2007-01-24 through 2026-09-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 106 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 20 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:** 52 rows; 2007-05-17 through 2026-01-06; source ID `msha-personal-health-samples`
- **Violations:** 126 rows; 2007-01-25 through 2026-08-10; 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/rivergate-3503659`
- JSON: `/api/v1/mines/rivergate-3503659`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3503659/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3503659/relationships`
- MCP resource: `mine://3503659/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`