# Relationship history for MSHA mine 1512412

Current hierarchy: **Partin Houstin → S & J Coal Company → No 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:** King-Bryant & Runyon Coal Company → No 1 Mine; 1980-06-01 to 1982-06-08; source msha-controller-operator-history
- **controller_controls_mine:** King Cecil E-Larry M Bryant Et Al → No 1 Mine; 1980-06-01 to 1982-06-08; source msha-controller-operator-history
- **controller_controls_operator:** King Cecil E-Larry M Bryant Et Al → King-Bryant & Runyon Coal Company; 1980-06-01 to 1982-06-08; source msha-controller-operator-history
- **operator_operates_mine:** S & J Coal Company → No 1 Mine; 1982-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Partin Houstin Et Al → No 1 Mine; 1982-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Partin Houstin Et Al → S & J Coal Company; 1982-06-09 to current/open; source msha-controller-operator-history