# Relationship history for MSHA mine 3609020

Current hierarchy: **Stacey  McClain → S. McClain Stone Co. Inc. → McClain Quarry #6**

- 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:** Algerd Choplosky, Jr. → McClain Quarry #6; 2001-09-01 to 2022-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Algerd  Choplosky Jr → McClain Quarry #6; 2001-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Algerd  Choplosky Jr → Algerd Choplosky, Jr.; 2001-09-01 to 2022-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Stacey  McClain → McClain Quarry #6; 2005-08-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S. McClain Stone Co. Inc. → McClain Quarry #6; 2022-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacey  McClain → S. McClain Stone Co. Inc.; 2022-04-26 to current/open; source msha-controller-operator-history