# Relationship history for MSHA mine 4001110

Current hierarchy: **Pacific Tin → Tafco Inc → No 1 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

- **controller_controls_mine:** Burress Earl & Roy → No 1 Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Paint Rock Coal & Lumber Company → No 1 Tipple; 1950-01-01 to 1976-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Sexton James C → No 1 Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sexton James C → Paint Rock Coal & Lumber Company; 1950-01-01 to 1976-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Pacific Tin → No 1 Tipple; 1975-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tafco Inc → No 1 Tipple; 1976-02-18 to 1977-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Pacific Tin → Tafco Inc; 1976-02-18 to 1977-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Helenwood Excavating Company → No 1 Tipple; 1977-01-18 to 1978-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Burress Earl & Roy → Helenwood Excavating Company; 1977-01-18 to 1978-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Tafco Inc → No 1 Tipple; 1978-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pacific Tin → Tafco Inc; 1978-03-20 to current/open; source msha-controller-operator-history