# Relationship history for MSHA mine 4406084

Current hierarchy: **William D  Humphreys → Humphreys Enterprises, Inc. → No 27 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

- **controller_controls_mine:** William D  Humphreys et al → No 27 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William D  Humphreys et al → No 27 Strip; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Greater Wise Inc → No 27 Strip; 1984-11-01 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William D  Humphreys et al → Greater Wise Inc; 1984-11-01 to 2011-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Humphreys Enterprises, Inc. → No 27 Strip; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D  Humphreys et al → Humphreys Enterprises, Inc.; 2012-01-01 to current/open; source msha-controller-operator-history