# Relationship history for MSHA mine 0405379

Current hierarchy: **Richard  Sykora; Greg  Sykora → Greg & Mike Sykora → WILD CAT MINES**

- 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:** Greg & Mike Sykora → WILD CAT MINES; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Sykora et al → WILD CAT MINES; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Sykora et al → Greg & Mike Sykora; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Sykora et al → Greg & Mike Sykora; 1999-07-01 to current/open; source msha-controller-operator-history