# Relationship history for MSHA mine 0103222

Current hierarchy: **Otis  Skinner → Swasher Inc → Swasher #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

- **controller_controls_mine:** Otis  Skinner → Swasher #1; 1996-12-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Swasher Inc → Swasher #1; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Otis  Skinner → Swasher Inc; 2001-08-01 to current/open; source msha-controller-operator-history