# Relationship history for MSHA mine 4403913

Current hierarchy: **Taylor Rodney E → Bluston Mining Inc → #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

- **operator_operates_mine:** Hadco Coal Inc → #1 Strip; 1950-01-01 to 1977-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Robert R → #1 Strip; 1950-01-01 to 1977-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Robert R → Hadco Coal Inc; 1950-01-01 to 1977-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Bluston Mining Inc → #1 Strip; 1977-05-26 to 1978-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Vasvary Daniel → #1 Strip; 1977-05-26 to 1978-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Vasvary Daniel → Bluston Mining Inc; 1977-05-26 to 1978-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Bluston Mining Inc → #1 Strip; 1978-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Rodney E → #1 Strip; 1978-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Rodney E → Bluston Mining Inc; 1978-10-12 to current/open; source msha-controller-operator-history