# Relationship history for MSHA mine 4002862

Current hierarchy: **Fife Jack D → Fife Coal Company Inc → 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:** Piko Corp → No 1 Mine; 1984-10-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Messick William F → No 1 Mine; 1984-10-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Messick William F → Piko Corp; 1984-10-01 to 1986-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Fife Jack D → No 1 Mine; 1985-05-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Morgan Springs Mining Company → No 1 Mine; 1986-07-15 to 1988-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Stroutman Paul Et Al → No 1 Mine; 1986-07-15 to 1988-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Stroutman Paul Et Al → Morgan Springs Mining Company; 1986-07-15 to 1988-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Fife Coal Company Inc → No 1 Mine; 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fife Jack D → Fife Coal Company Inc; 1988-09-01 to current/open; source msha-controller-operator-history