# Relationship history for MSHA mine 1512438

Current hierarchy: **Slone Johnny & Donnie Newsome → D & 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

- **controller_controls_mine:** Howell Corporation → No 1 Mine; 1977-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lake Coal Company Inc → No 1 Mine; 1980-07-01 to 1980-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Howell Corporation → Lake Coal Company Inc; 1980-07-01 to 1980-10-14; source msha-controller-operator-history
- **operator_operates_mine:** D & J Coal Company → No 1 Mine; 1980-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Slone Johnny & Donnie Newsome → No 1 Mine; 1980-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Slone Johnny & Donnie Newsome → D & J Coal Company; 1980-10-15 to current/open; source msha-controller-operator-history