# Relationship history for MSHA mine 4605335

Current hierarchy: **Finn Earl W → Associated Coal Enterprises Inc → Twilight Surface No 1**

- 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:** Miami Springs Properties Inc → Twilight Surface No 1; 1976-11-01 to 1977-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Joyce Western Corp → Twilight Surface No 1; 1976-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joyce Western Corp → Miami Springs Properties Inc; 1976-11-01 to 1977-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Associated Coal Enterprises Inc → Twilight Surface No 1; 1977-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Finn Earl W → Twilight Surface No 1; 1977-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Finn Earl W → Associated Coal Enterprises Inc; 1977-03-15 to current/open; source msha-controller-operator-history