# Relationship history for MSHA mine 3101148

Current hierarchy: **Zemex Corp → Zemex Mica Corp → MICAVILLE**

- 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:** Deneen Mica Company Inc → MICAVILLE; 1950-01-01 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Deneen Fred Iii → MICAVILLE; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deneen Fred Iii → Deneen Mica Company Inc; 1950-01-01 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Peele → MICAVILLE; 1993-07-15 to 1998-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Aspect Minerals Inc → MICAVILLE; 1994-04-01 to 1998-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Peele → Aspect Minerals Inc; 1994-04-01 to 1998-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Zemex Mica Corp → MICAVILLE; 1998-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zemex Corp → MICAVILLE; 1998-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zemex Corp → Zemex Mica Corp; 1998-01-23 to current/open; source msha-controller-operator-history