# Relationship history for MSHA mine 3604306

Current hierarchy: **Tassone Joseph P → Mon-West Enterprises → Lock #8**

- 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:** Valentine James & Charles F Speggen → Lock #8; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Telio Packroni → Lock #8; 1950-01-01 to 1977-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Packroni Telio → Lock #8; 1950-01-01 to 1977-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Packroni Telio → Telio Packroni; 1950-01-01 to 1977-03-21; source msha-controller-operator-history
- **operator_operates_mine:** J & C Loading Company → Lock #8; 1977-03-22 to 1987-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Valentine James & Charles F Speggen → J & C Loading Company; 1977-03-22 to 1987-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Mon-West Enterprises → Lock #8; 1987-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tassone Joseph P → Lock #8; 1987-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tassone Joseph P → Mon-West Enterprises; 1987-12-21 to current/open; source msha-controller-operator-history