# Relationship history for MSHA mine 4405164

Current hierarchy: **Evans Billy P → Coal Diggers Inc → No 1 Strip**

- 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:** Mullins Larry D & J W Poteet → No 1 Strip; 1978-12-01 to 1979-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Coal Diggers Inc → No 1 Strip; 1979-01-01 to 1979-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Larry D & J W Poteet → Coal Diggers Inc; 1979-01-01 to 1979-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Coal Diggers Inc → No 1 Strip; 1979-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Evans Billy P → No 1 Strip; 1979-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Evans Billy P → Coal Diggers Inc; 1979-07-26 to current/open; source msha-controller-operator-history