# Relationship history for MSHA mine 1513554

Current hierarchy: **Ricky D  Franklin → Mountain Energy Sales Inc → No 1 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

- **controller_controls_mine:** Epling Walter Ben & Michael R → No 1 Tipple; 1981-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elkhorn Drilling Company → No 1 Tipple; 1982-07-01 to 1991-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Epling Walter Ben & Michael R → Elkhorn Drilling Company; 1982-07-01 to 1991-10-06; source msha-controller-operator-history
- **controller_controls_mine:** Ricky D  Franklin → No 1 Tipple; 1988-11-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Energy Sales Inc → No 1 Tipple; 1991-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ricky D  Franklin → Mountain Energy Sales Inc; 1991-10-07 to current/open; source msha-controller-operator-history