# Relationship history for MSHA mine 4001099

Current hierarchy: **Bradley Equipment Company Inc → J & C Coal Corp → Elk Valley Tipple**

- 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

- **operator_operates_mine:** Farco Mining Company → Elk Valley Tipple; 1950-01-01 to 1979-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Farrell Construction Company → Elk Valley Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Farrell Construction Company → Farco Mining Company; 1950-01-01 to 1979-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Harold F Et Al → Elk Valley Tipple; 1979-03-01 to 1982-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Coal Processing Inc → Elk Valley Tipple; 1979-07-26 to 1982-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Pioneer Coal Processing Inc; 1979-07-26 to 1982-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Larry E  Smith et al → Elk Valley Tipple; 1982-09-21 to 1987-01-14; source msha-controller-operator-history
- **operator_operates_mine:** N E R Of Tennessee Inc → Elk Valley Tipple; 1982-10-11 to 1987-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Larry E  Smith et al → N E R Of Tennessee Inc; 1982-10-11 to 1987-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Bradley Equipment Company Inc → Elk Valley Tipple; 1985-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & C Coal Corp → Elk Valley Tipple; 1987-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley Equipment Company Inc → J & C Coal Corp; 1987-01-15 to current/open; source msha-controller-operator-history