# Relationship history for MSHA mine 3602213

Current hierarchy: **Slovick Ronald L & William J Tarr → Pine Line 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:** Pine Line Coal Company → No 1 Mine; 1950-01-01 to 1982-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Dietz Gordon L Jr → No 1 Mine; 1950-01-01 to 1982-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Dietz Gordon L Jr → Pine Line Coal Company; 1950-01-01 to 1982-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Pine Line Coal Company → No 1 Mine; 1982-09-14 to 1983-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Slovick Ronald L-Anthony Alexander Et Al → No 1 Mine; 1982-09-14 to 1983-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Slovick Ronald L-Anthony Alexander Et Al → Pine Line Coal Company; 1982-09-14 to 1983-08-11; source msha-controller-operator-history
- **operator_operates_mine:** Pine Line Coal Company → No 1 Mine; 1983-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Slovick Ronald L & William J Tarr → No 1 Mine; 1983-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Slovick Ronald L & William J Tarr → Pine Line Coal Company; 1983-08-12 to current/open; source msha-controller-operator-history