# Relationship history for MSHA mine 4405484

Current hierarchy: **Murphy Ronald D → Mc Murphy Mining Inc → No 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

- **operator_operates_mine:** Grine Coal Company → No 1; 1980-08-01 to 1983-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Hall Wheeler Et Al → No 1; 1980-08-01 to 1983-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Hall Wheeler Et Al → Grine Coal Company; 1980-08-01 to 1983-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Baker Ralph → No 1; 1982-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Mountain Coal Inc → No 1; 1983-11-01 to 1985-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Baker Ralph → Little Mountain Coal Inc; 1983-11-01 to 1985-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Son Mining Inc → No 1; 1985-01-09 to 1986-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Cline → No 1; 1985-01-09 to 1986-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Cline → Tri-Son Mining Inc; 1985-01-09 to 1986-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Napier Clarence R Jr → No 1; 1986-01-15 to 1988-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Laran Coal Company Inc → No 1; 1986-10-30 to 1988-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Napier Clarence R Jr → Laran Coal Company Inc; 1986-10-30 to 1988-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Mc Murphy Mining Inc → No 1; 1988-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Murphy Ronald D → No 1; 1988-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Murphy Ronald D → Mc Murphy Mining Inc; 1988-10-11 to current/open; source msha-controller-operator-history