# Relationship history for MSHA mine 4801901

Current hierarchy: **Jenya C  Lamb → G & L Water → Jaw Crusher**

- 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:** Jenya C  Lamb et al → Jaw Crusher; 2014-06-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G & L Water → Jaw Crusher; 2026-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jenya C  Lamb et al → G & L Water; 2026-05-05 to current/open; source msha-controller-operator-history