# Relationship history for MSHA mine 0101268

Current hierarchy: **Walter Energy Incorporated → Jim Walter Resources Inc → Nebo**

- 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:** Walter Energy Incorporated → Nebo; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Coal Company Inc → Nebo; 1950-01-01 to 1981-10-22; source msha-controller-operator-history
- **controller_controls_mine:** West Ed → Nebo; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** West Ed → West Coal Company Inc; 1950-01-01 to 1981-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Jim Walter Resources Inc → Nebo; 1981-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter Energy Incorporated → Jim Walter Resources Inc; 1981-10-23 to current/open; source msha-controller-operator-history