# Relationship history for MSHA mine 1509571

Current hierarchy: **Alliance Resource Partners LP → Excel Mining LLC → Mine No 2**

- 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:** MAPCO Inc → Mine No 2; 1975-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pontiki Coal Corp → Mine No 2; 1975-10-29 to 1996-07-10; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Pontiki Coal Corp; 1975-10-29 to 1996-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Excel Mining LLC → Mine No 2; 1996-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alliance Resource Partners LP → Mine No 2; 1996-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alliance Resource Partners LP → Excel Mining LLC; 1996-07-11 to current/open; source msha-controller-operator-history