# Relationship history for MSHA mine 4403788

Current hierarchy: **Edwards Danie G → Trinity Coal Corp → No 2 Mine**

- 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

- **controller_controls_mine:** Lester Robert & Bobby Blankenship → No 2 Mine; 1973-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & L Coal Company → No 2 Mine; 1974-01-01 to 1974-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Lester Robert & Bobby Blankenship → L & L Coal Company; 1974-01-01 to 1974-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Edwards Danie G → No 2 Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Coal Corp → No 2 Mine; 1974-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edwards Danie G → Trinity Coal Corp; 1974-11-01 to current/open; source msha-controller-operator-history