# Relationship history for MSHA mine 4404300

Current hierarchy: **Matney Henry & Frank Rash → Nicky Coal Company Inc → #1**

- 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:** Daddy-O Coal Company → #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Daddy-O Coal Company → #1; 1976-03-01 to 1986-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Daddy-O Coal Company → Daddy-O Coal Company; 1976-03-01 to 1986-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Silver Creek Mining Corp → #1; 1986-08-21 to 1988-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Skeens Dewey & Robert Pugh → #1; 1986-08-21 to 1988-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Skeens Dewey & Robert Pugh → Silver Creek Mining Corp; 1986-08-21 to 1988-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Liberty Resources Inc → #1; 1988-03-16 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Morgan Dale → #1; 1988-03-16 to 1989-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Morgan Dale → Liberty Resources Inc; 1988-03-16 to 1989-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Nicky Coal Company Inc → #1; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matney Henry & Frank Rash → #1; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matney Henry & Frank Rash → Nicky Coal Company Inc; 1989-05-01 to current/open; source msha-controller-operator-history