# Relationship history for MSHA mine 0103015

Current hierarchy: **Walter Energy Incorporated → Taft Coal Sales & Associates Inc → Wolf Creek North**

- 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:** A J  Taft → Wolf Creek North; 1990-01-01 to 2008-09-03; source msha-controller-operator-history
- **operator_operates_mine:** Taft Coal Sales & Associates Inc → Wolf Creek North; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A J  Taft → Taft Coal Sales & Associates Inc; 1994-05-01 to 2008-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Walter Energy Incorporated → Wolf Creek North; 2008-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter Energy Incorporated → Taft Coal Sales & Associates Inc; 2008-09-04 to current/open; source msha-controller-operator-history