# Relationship history for MSHA mine 1515233

Current hierarchy: **Lawson John & Clarence → G & L Coal Company → #1 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

- **operator_operates_mine:** Remote Coal → #1 Mine; 1985-05-01 to 1985-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Fulton William E & Jack Moore Et Al → #1 Mine; 1985-05-01 to 1985-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Fulton William E & Jack Moore Et Al → Remote Coal; 1985-05-01 to 1985-08-22; source msha-controller-operator-history
- **operator_operates_mine:** G & L Coal Company → #1 Mine; 1985-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawson John & Clarence Et Al → #1 Mine; 1985-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawson John & Clarence Et Al → G & L Coal Company; 1985-08-23 to current/open; source msha-controller-operator-history