# Relationship history for MSHA mine 3608023

Current hierarchy: **De Leo Frank → Pardeesville Associates → Plains Twp Operation**

- 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:** G & L Enterprises → Plains Twp Operation; 1988-06-01 to 1991-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Lispi Eugene-Raymond Giza Et Al → Plains Twp Operation; 1988-06-01 to 1991-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Lispi Eugene-Raymond Giza Et Al → G & L Enterprises; 1988-06-01 to 1991-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Pardeesville Associates → Plains Twp Operation; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** De Leo Frank → Plains Twp Operation; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** De Leo Frank → Pardeesville Associates; 1991-02-01 to current/open; source msha-controller-operator-history