# Relationship history for MSHA mine 4606952

Current hierarchy: **Lanta Coal Corp-A T Mining Corp → Atlanta Mining → No 2a**

- 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:** Lanta Coal Corp-A T Mining Corp Et Al → No 2a; 1983-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Atlanta Mining → No 2a; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lanta Coal Corp-A T Mining Corp Et Al → Atlanta Mining; 1985-06-01 to current/open; source msha-controller-operator-history