# Relationship history for MSHA mine 3605535

Current hierarchy: **Niles V  Powell → Acv Power Corp → Wildwood**

- 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:** P G Coal Company Inc → Wildwood; 1975-01-01 to 1975-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Greb Walter → Wildwood; 1975-01-01 to 1975-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Greb Walter → P G Coal Company Inc; 1975-01-01 to 1975-12-31; source msha-controller-operator-history
- **operator_operates_mine:** P G Coal Company Inc → Wildwood; 1976-01-01 to 1983-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Winchester Corp → Wildwood; 1976-01-01 to 1983-05-10; source msha-controller-operator-history
- **controller_controls_operator:** Winchester Corp → P G Coal Company Inc; 1976-01-01 to 1983-05-10; source msha-controller-operator-history
- **operator_operates_mine:** P G Coal Company Inc → Wildwood; 1983-05-11 to 1993-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Gauthier David A → Wildwood; 1983-05-11 to 1993-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Gauthier David A → P G Coal Company Inc; 1983-05-11 to 1993-11-11; source msha-controller-operator-history
- **operator_operates_mine:** Acv Power Corp → Wildwood; 1993-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Niles V  Powell → Wildwood; 1993-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Niles V  Powell → Acv Power Corp; 1993-11-12 to current/open; source msha-controller-operator-history