# Relationship history for MSHA mine 1516693

Current hierarchy: **James River Coal Company → Mc Coy Elkhorn Coal Corp → Smith Fork Mine No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Dennis Allen  Ramey → Smith Fork Mine No 1; 1987-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Smith Fork Mine No 1; 1988-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United Fuels Inc → Smith Fork Mine No 1; 1989-08-01 to 1992-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Dennis Allen  Ramey → United Fuels Inc; 1989-08-01 to 1992-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Elkhorn Coal Corp → Smith Fork Mine No 1; 1992-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Mc Coy Elkhorn Coal Corp; 1992-05-01 to current/open; source msha-controller-operator-history