# Relationship history for MSHA mine 4607184

Current hierarchy: **Eddie  Hurley → Thacker Loading Inc → Loading Dock**

- 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:** Billy'S Washing Company → Loading Dock; 1986-08-01 to 1987-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Mapes Billy → Loading Dock; 1986-08-01 to 1987-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Mapes Billy → Billy'S Washing Company; 1986-08-01 to 1987-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Kennith  Layne et al → Loading Dock; 1986-12-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alma Developing Inc → Loading Dock; 1987-10-14 to 1989-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Kennith  Layne et al → Alma Developing Inc; 1987-10-14 to 1989-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Les  Mayhorn et al → Alma Developing Inc; 1987-10-14 to 1989-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Thacker Loading Inc → Loading Dock; 1989-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Hurley → Loading Dock; 1989-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Hurley → Thacker Loading Inc; 1989-10-03 to current/open; source msha-controller-operator-history