# Relationship history for MSHA mine 0302106

Current hierarchy: **John  O'Brien; Michel  East; John  Carson → Proctor Lime Company, LLC. → Lafferty Quarry**

- 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:** Proctor Lime Company, LLC. → Lafferty Quarry; 2026-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Carson et al → Lafferty Quarry; 2026-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Carson et al → Proctor Lime Company, LLC.; 2026-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  O'Brien et al → Proctor Lime Company, LLC.; 2026-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michel  East et al → Proctor Lime Company, LLC.; 2026-07-29 to current/open; source msha-controller-operator-history