# Relationship history for MSHA mine 4604490

Current hierarchy: **Stanley Arthur Don → Stanley Coal Company → 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

- **controller_controls_mine:** Tomblin Archie & Paul → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley Arthur Don → No 2; 1974-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elk Mining Company Inc → No 2; 1974-12-31 to 1976-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Tomblin Archie & Paul → Elk Mining Company Inc; 1974-12-31 to 1976-12-06; source msha-controller-operator-history
- **operator_operates_mine:** Stanley Coal Company → No 2; 1976-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley Arthur Don → Stanley Coal Company; 1976-12-07 to current/open; source msha-controller-operator-history