# Relationship history for MSHA mine 0201866

Current hierarchy: **Burt Leon → L & B Partners → Jack Pot Mill**

- 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:** A J Madden Company → Jack Pot Mill; 1950-01-01 to 1979-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Madden A J → Jack Pot Mill; 1950-01-01 to 1979-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Madden A J → A J Madden Company; 1950-01-01 to 1979-05-16; source msha-controller-operator-history
- **operator_operates_mine:** L & B Partners → Jack Pot Mill; 1979-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Burt Leon → Jack Pot Mill; 1979-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burt Leon → L & B Partners; 1979-05-17 to current/open; source msha-controller-operator-history