# Relationship history for MSHA mine 4405395

Current hierarchy: **Hay Walker W → D O & W Coal Company Inc → #13**

- 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:** Blankenship Joda → #13; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Apache Coal Company Inc → #13; 1980-03-01 to 1988-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Joda → Apache Coal Company Inc; 1980-03-01 to 1988-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Hay Walker W Et Al → #13; 1983-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barton Lendon → #13; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jessie  Meadows → #13; 1988-04-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & L Coal Company Inc → #13; 1988-09-15 to 1991-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Barton Lendon → D & L Coal Company Inc; 1988-09-15 to 1991-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Jamb Mining Inc → #13; 1991-01-04 to 1995-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Jessie  Meadows → Jamb Mining Inc; 1991-01-04 to 1995-02-20; source msha-controller-operator-history
- **operator_operates_mine:** D O & W Coal Company Inc → #13; 1995-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hay Walker W Et Al → D O & W Coal Company Inc; 1995-02-21 to current/open; source msha-controller-operator-history