# Ridgetop Development Surface Mine 4

- **MSHA mine ID:** 4003515
- **Status:** Abandoned
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Claiborne, TN
- **Operator:** Ridgetop Development, LLC
- **Controller:** Robert S  Toller
- **Public source rows linked:** 98
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Robert S  Toller (0165681) → Ridgetop Development, LLC (0142613) → Ridgetop Development Surface Mine 4 (4003515)**

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

## Controller and operator valid-time history

- **Energy, Incorporated et al → Ridgetop Development, LLC:** 2019-03-11 through 2017-08-03; derived from co-tenure at mine 4003515; source `msha-controller-operator-history`.
- **Jeffrey K Mullins et al → Ridgetop Development, LLC:** 2019-03-11 through 2017-08-03; derived from co-tenure at mine 4003515; source `msha-controller-operator-history`.
- **WC Ridgetop Holding Inc et al → Ridgetop Development, LLC:** 2019-03-11 through 2021-11-30; derived from co-tenure at mine 4003515; source `msha-controller-operator-history`.
- **Energy, Incorporated et al → Ridgetop Development, LLC:** 2019-03-11 through 2021-11-30; derived from co-tenure at mine 4003515; source `msha-controller-operator-history`.
- **Robert S  Toller → Ridgetop Development, LLC:** 2021-12-01 through current/open; derived from co-tenure at mine 4003515; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 9
- Interval anomalies: 2
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 14 violation rows across the full record; 0 carry an S&S flag and $1,694 appears in current assessed amounts.
3. **HEALTH — 35 samples:** Occupational health samples 21 coal dust; 4 coal quartz; 10 noise. 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 6 since 2021:** Inspections 14 inspection events and 298 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 77.1605 — Loading and haulage equipment; installations.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605
- **30 CFR 77.1104 — Accumulations of combustible materials.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104
- **30 CFR 77.1110 — Examination and maintenance of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110
- **30 CFR 77.1000 — Highwalls, pits and spoil banks; plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-K/section-77.1000
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.1706 — First aid training program; minimum requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1706

## Source coverage

- **Addresses of Record:** 1 rows; 2023-04-04 through 2023-04-04; source ID `msha-addresses`
- **Assessed Violations:** 14 rows; 2019-08-28 through 2019-10-22; source ID `msha-assessed-violations`
- **Coal Dust Samples:** 21 rows; 2019-06-03 through 2019-12-03; source ID `msha-coal-dust-samples`
- **Controller and Operator History:** 5 rows; 2019-03-11 through 2019-03-11; source ID `msha-controller-operator-history`
- **Inspections:** 14 rows; 2019-05-03 through 2023-04-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 13 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 1 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 10 rows; 2019-08-28 through 2019-10-25; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 4 rows; 2019-09-12 through 2019-10-25; source ID `msha-quartz-samples`
- **Violations:** 14 rows; 2019-08-28 through 2019-10-22; 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/ridgetop-development-surface-mine-4-4003515`
- JSON: `/api/v1/mines/ridgetop-development-surface-mine-4-4003515`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4003515/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4003515/relationships`
- MCP resource: `mine://4003515/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`