# Relationship history for MSHA mine 4405485

Current hierarchy: **Di Rico William A Jr → Janice Marie Coal Company Inc → #1 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

- **operator_operates_mine:** Janice Marie Coal Company Inc → #1 Strip; 1980-08-01 to 1981-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Rose Carl Et Al → #1 Strip; 1980-08-01 to 1981-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Rose Carl Et Al → Janice Marie Coal Company Inc; 1980-08-01 to 1981-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Janice Marie Coal Company Inc → #1 Strip; 1981-11-04 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Killen Billy → #1 Strip; 1981-11-04 to 1981-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Killen Billy → Janice Marie Coal Company Inc; 1981-11-04 to 1981-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Janice Marie Coal Company Inc → #1 Strip; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Di Rico William A Jr → #1 Strip; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Di Rico William A Jr → Janice Marie Coal Company Inc; 1982-01-01 to current/open; source msha-controller-operator-history