# Relationship history for MSHA mine 4605593

Current hierarchy: **Toler Floyd D → Marsha Mining Company Inc → Marsha No 2 Tipple**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Pegasus Mining Corp → Marsha No 2 Tipple; 1977-08-01 to 1984-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Bavensdorf Inc → Marsha No 2 Tipple; 1977-08-01 to 1984-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Bavensdorf Inc → Pegasus Mining Corp; 1977-08-01 to 1984-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Marsha Mining Company Inc → Marsha No 2 Tipple; 1984-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Toler Floyd D → Marsha No 2 Tipple; 1984-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Toler Floyd D → Marsha Mining Company Inc; 1984-06-28 to current/open; source msha-controller-operator-history