# Relationship history for MSHA mine 4606514

Current hierarchy: **Bland William H → B L & S Coal Company Inc → No 2 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:** Rundle Patrick J → No 2 Mine; 1978-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Resources Inc → No 2 Mine; 1982-04-01 to 1987-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Rundle Patrick J → Coal Resources Inc; 1982-04-01 to 1987-10-27; source msha-controller-operator-history
- **controller_controls_mine:** John A  Laurita → No 2 Mine; 1984-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bland William H → No 2 Mine; 1987-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J A L Coal Company Inc → No 2 Mine; 1987-10-28 to 1988-02-22; source msha-controller-operator-history
- **controller_controls_operator:** John A  Laurita → J A L Coal Company Inc; 1987-10-28 to 1988-02-22; source msha-controller-operator-history
- **operator_operates_mine:** B L & S Coal Company Inc → No 2 Mine; 1988-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bland William H → B L & S Coal Company Inc; 1988-02-24 to current/open; source msha-controller-operator-history