# Relationship history for MSHA mine 1507683

Current hierarchy: **Ricky D  Franklin → Mountain Energy Sales Inc → No 2 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:** Ralston Coal Company → No 2 Tipple; 1974-06-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ralston A Henry → No 2 Tipple; 1974-06-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ralston A Henry → Ralston Coal Company; 1974-06-01 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Carroll Robert B → No 2 Tipple; 1985-09-16 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Luttrell Mining Company Inc → No 2 Tipple; 1986-01-01 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Carroll Robert B → Luttrell Mining Company Inc; 1986-01-01 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Arbor Coal Inc → No 2 Tipple; 1987-10-01 to 1988-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Mills Vance Et Al → No 2 Tipple; 1987-10-01 to 1988-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Mills Vance Et Al → Arbor Coal Inc; 1987-10-01 to 1988-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Ricky D  Franklin → No 2 Tipple; 1988-11-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E G & R Coal Corp → No 2 Tipple; 1988-12-01 to 1990-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Barbara  Evans et al → No 2 Tipple; 1988-12-01 to 1990-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Evans et al → E G & R Coal Corp; 1988-12-01 to 1990-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Energy Sales Inc → No 2 Tipple; 1990-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ricky D  Franklin → Mountain Energy Sales Inc; 1990-01-25 to current/open; source msha-controller-operator-history