# Relationship history for MSHA mine 1513241

Current hierarchy: **Dixon Neal R → Energy Works Inc → Squabble #1**

- 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:** Can-Am → Squabble #1; 1981-10-01 to 1982-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Andrews J Dixon → Squabble #1; 1981-10-01 to 1982-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Andrews J Dixon → Can-Am; 1981-10-01 to 1982-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Energy Works Inc → Squabble #1; 1982-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dixon Neal R → Squabble #1; 1982-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dixon Neal R → Energy Works Inc; 1982-08-30 to current/open; source msha-controller-operator-history