# Relationship history for MSHA mine 1700955

Current hierarchy: **Bruce G Meklin; Eric A Meklin → Meklin Excavation → Cushing Pit**

- 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:** Meklin Excavation → Cushing Pit; 2015-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce G Meklin et al → Cushing Pit; 2015-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce G Meklin et al → Meklin Excavation; 2015-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric A Meklin et al → Meklin Excavation; 2015-05-13 to current/open; source msha-controller-operator-history