# Relationship history for MSHA mine 4703219

Current hierarchy: **EVS Master Holdco LLC → Eden Stone Co., LLC → Columbus Quarry**

- 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:** William  Gesell et al → Columbus Quarry; 1950-01-01 to 2012-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Michels Corporation → Columbus Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Michels Pipeline Construction Inc → Columbus Quarry; 1999-08-01 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Michels Corporation → Michels Pipeline Construction Inc; 1999-08-01 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_mine:** David  Wirtz → Columbus Quarry; 2013-01-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_mine:** William  Gesell et al → Columbus Quarry; 2016-04-01 to 2023-06-27; source msha-controller-operator-history
- **controller_controls_mine:** EVS Master Holdco LLC → Columbus Quarry; 2023-06-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eden Stone Co., LLC → Columbus Quarry; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wirtz → Eden Stone Co., LLC; 2024-01-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_operator:** EVS Master Holdco LLC → Eden Stone Co., LLC; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Gesell et al → Eden Stone Co., LLC; 2024-01-01 to 2012-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Gesell et al → Eden Stone Co., LLC; 2024-01-01 to 2023-06-27; source msha-controller-operator-history