# Relationship history for MSHA mine 3402018

Current hierarchy: **Larry D  Watson; Misty D  Watson → BOGGY STONE → GARLAND #2**

- 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:** Misty D  Watson  et al → GARLAND #2; 2006-04-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BOGGY STONE → GARLAND #2; 2006-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Misty D  Watson  et al → BOGGY STONE; 2006-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry D  Watson  et al → BOGGY STONE; 2006-09-08 to current/open; source msha-controller-operator-history