# Relationship history for MSHA mine 4405466

Current hierarchy: **Bill  Nichols → Wellaby Coal Inc → No 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** H & S Coal Company → No 2; 1980-07-01 to 1984-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Sutherland David & Wilson R Hendricks → No 2; 1980-07-01 to 1984-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Sutherland David & Wilson R Hendricks → H & S Coal Company; 1980-07-01 to 1984-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Nichols → No 2; 1983-10-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Altus Coal Company Inc → No 2; 1984-02-22 to 1986-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Malcom  Gatt → No 2; 1984-02-22 to 1986-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Malcom  Gatt → Altus Coal Company Inc; 1984-02-22 to 1986-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Beverly Coal Company Inc → No 2; 1986-03-14 to 1986-07-08; source msha-controller-operator-history
- **controller_controls_mine:** William P  Harris et al → No 2; 1986-03-14 to 1986-07-08; source msha-controller-operator-history
- **controller_controls_operator:** William P  Harris et al → Beverly Coal Company Inc; 1986-03-14 to 1986-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Wellaby Coal Inc → No 2; 1986-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Nichols → Wellaby Coal Inc; 1986-07-09 to current/open; source msha-controller-operator-history