# Relationship history for MSHA mine 0202763

Current hierarchy: **Mark  McCauley; Lauren  McCauley; John  McCauley → Dyna Rock LLC → Chevelon 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:** Dyna Rock and Sand Inc → Chevelon Pit; 1998-04-01 to 2024-06-30; source msha-controller-operator-history
- **controller_controls_mine:** John C  Mc Cauley → Chevelon Pit; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John C  Mc Cauley → Dyna Rock and Sand Inc; 1998-04-01 to 2024-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Dyna Rock LLC → Chevelon Pit; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lauren  McCauley et al → Chevelon Pit; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lauren  McCauley et al → Dyna Rock LLC; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  McCauley et al → Dyna Rock LLC; 2024-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  McCauley et al → Dyna Rock LLC; 2024-07-01 to current/open; source msha-controller-operator-history