# Relationship history for MSHA mine 4606677

Current hierarchy: **Cook William Larry → Noble Coal Company Inc → #1 Mine**

- 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

- **controller_controls_mine:** White Mountain Mining Co., LLC → #1 Mine; 1978-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Banner Coal & Land Company → #1 Mine; 1983-08-01 to 1984-08-13; source msha-controller-operator-history
- **controller_controls_operator:** White Mountain Mining Co., LLC → Banner Coal & Land Company; 1983-08-01 to 1984-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Raleigh Crystal Coal Company → #1 Mine; 1984-08-14 to 1985-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Johnson James → #1 Mine; 1984-08-14 to 1985-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Johnson James → Raleigh Crystal Coal Company; 1984-08-14 to 1985-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Noble Coal Company Inc → #1 Mine; 1985-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cook William Larry → #1 Mine; 1985-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cook William Larry → Noble Coal Company Inc; 1985-06-11 to current/open; source msha-controller-operator-history