# Relationship history for MSHA mine 2900917

Current hierarchy: **Michele  Bonaguidi → Michele's Ready Mix Rock & Recycle Inc. → San Antone 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:** Gallup Sand & Gravel Company → San Antone Pit; 1950-01-01 to 1988-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Anthony  Kozeliski → San Antone Pit; 1950-01-01 to 1988-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Kozeliski → Gallup Sand & Gravel Company; 1950-01-01 to 1988-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Gallup Sand & Gravel Company → San Antone Pit; 1988-03-23 to 2007-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Frank A  Kozeliski → San Antone Pit; 1988-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank A  Kozeliski → Gallup Sand & Gravel Company; 1988-03-23 to 2007-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Southern Ute Indian Tribe → San Antone Pit; 2004-01-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gallup Sand & Gravel LLC → San Antone Pit; 2007-11-01 to 2017-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Southern Ute Indian Tribe → Gallup Sand & Gravel LLC; 2007-11-01 to 2017-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Michele's Ready Mix Rock & Recycle Inc. → San Antone Pit; 2017-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michele  Bonaguidi → San Antone Pit; 2017-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michele  Bonaguidi → Michele's Ready Mix Rock & Recycle Inc.; 2017-01-16 to current/open; source msha-controller-operator-history