# Relationship history for MSHA mine 4609150

Current hierarchy: **Douglas M  Epling → Mountain Edge Mining Inc → Dorothy No 3 Mine**

- 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:** Douglas M  Epling → Dorothy No 3 Mine; 1994-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Dorothy No 3 Mine; 1998-05-19 to 2007-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Pine Ridge Coal Company LLC → Dorothy No 3 Mine; 2006-07-07 to 2006-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Pine Ridge Coal Company LLC; 2006-07-07 to 2006-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Edge Mining Inc → Dorothy No 3 Mine; 2006-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas M  Epling → Mountain Edge Mining Inc; 2006-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Dorothy No 3 Mine; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Pine Ridge Coal Company LLC; 2007-10-31 to 2006-12-06; source msha-controller-operator-history