# Relationship history for MSHA mine 1700601

Current hierarchy: **Dale E Mills; Debbie E Lajoie → Dwight R Mills Inc → Mills Plant**

- 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:** Dwight R Mills Inc → Mills Plant; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dwight R  Mills → Mills Plant; 1990-08-01 to 2022-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Dwight R  Mills → Dwight R Mills Inc; 1990-08-01 to 2022-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Debbie E Lajoie et al → Mills Plant; 2022-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debbie E Lajoie et al → Dwight R Mills Inc; 2022-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale E Mills et al → Dwight R Mills Inc; 2022-02-02 to current/open; source msha-controller-operator-history