# Relationship history for MSHA mine 1515750

Current hierarchy: **Siegel John J Jr → Flaget Fuels Inc → No 1 Surface**

- 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:** Gilbert Jimmie Et Al → No 1 Surface; 1985-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gilbert Mining Corp → No 1 Surface; 1986-09-01 to 1987-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Gilbert Jimmie Et Al → Gilbert Mining Corp; 1986-09-01 to 1987-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Flaget Fuels Inc → No 1 Surface; 1987-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Siegel John J Jr → No 1 Surface; 1987-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siegel John J Jr → Flaget Fuels Inc; 1987-03-09 to current/open; source msha-controller-operator-history