# Relationship history for MSHA mine 3608166

Current hierarchy: **Lucas Gary → L L & S Coal Company → L L & S Mine**

- 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:** Potts Allen L → L L & S Mine; 1982-02-01 to 1993-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Potts Contracting Company Inc → L L & S Mine; 1990-04-01 to 1993-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Potts Allen L → Potts Contracting Company Inc; 1990-04-01 to 1993-01-07; source msha-controller-operator-history
- **operator_operates_mine:** L L & S Coal Company → L L & S Mine; 1993-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lucas Gary Et Al → L L & S Mine; 1993-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucas Gary Et Al → L L & S Coal Company; 1993-01-08 to current/open; source msha-controller-operator-history