# Relationship history for MSHA mine 4404264

Current hierarchy: **Steve  Meade → Mountaintop Inc → Tacoma Plant**

- 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:** Spring Collieries Inc → Tacoma Plant; 1976-01-01 to 1993-08-26; source msha-controller-operator-history
- **controller_controls_mine:** John M  Prince → Tacoma Plant; 1976-01-01 to 1993-08-26; source msha-controller-operator-history
- **controller_controls_operator:** John M  Prince → Spring Collieries Inc; 1976-01-01 to 1993-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Meade → Tacoma Plant; 1991-04-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T-Berry Coal Company → Tacoma Plant; 1993-08-27 to 1995-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Theodore  Colley → Tacoma Plant; 1993-08-27 to 1995-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Colley → T-Berry Coal Company; 1993-08-27 to 1995-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Energy Inc → Tacoma Plant; 1995-01-30 to 2004-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Meade → Mountain Energy Inc; 1995-01-30 to 2004-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Meade → Tacoma Plant; 2003-03-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri Energy, Inc. - Tacoma Plant → Tacoma Plant; 2004-01-16 to 2005-01-24; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Jennings et al → Tacoma Plant; 2004-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Jennings et al → Tri Energy, Inc. - Tacoma Plant; 2004-01-16 to 2005-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Shubert et al → Tri Energy, Inc. - Tacoma Plant; 2004-01-16 to 2005-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Mountaintop Inc → Tacoma Plant; 2005-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Meade → Mountaintop Inc; 2005-01-25 to current/open; source msha-controller-operator-history