# Relationship history for MSHA mine 3503722

Current hierarchy: **Marin John  Artukovich → 808 Mines → Paul Ada #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

- **operator_operates_mine:** Arthur N. Lacey → Paul Ada #2; 2009-08-21 to 2016-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Arthur N  Lacey → Paul Ada #2; 2009-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur N  Lacey → Arthur N. Lacey; 2009-08-21 to 2016-04-30; source msha-controller-operator-history
- **operator_operates_mine:** 808 Mines → Paul Ada #2; 2016-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marin John  Artukovich → Paul Ada #2; 2016-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marin John  Artukovich → 808 Mines; 2016-05-01 to current/open; source msha-controller-operator-history