# Relationship history for MSHA mine 4405771

Current hierarchy: **Ramey Larry E → Blue Spade Coal Company Inc → No 2**

- 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:** Triple Y Coal Corp → No 2; 1981-10-01 to 1981-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Lester James E → No 2; 1981-10-01 to 1981-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Lester James E → Triple Y Coal Corp; 1981-10-01 to 1981-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Ramey Larry E → No 2; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Spade Coal Company Inc → No 2; 1981-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ramey Larry E → Blue Spade Coal Company Inc; 1981-12-01 to current/open; source msha-controller-operator-history