# Relationship history for MSHA mine 2003079

Current hierarchy: **Mark  Constine → Constine Gravel Company → M52 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

- **controller_controls_mine:** Rod  Constine  et al → M52 PIT; 1996-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Constine Inc → M52 PIT; 1998-07-01 to 2009-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Rod  Constine  et al → Constine Inc; 1998-07-01 to 2009-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Constine  et al → Constine Inc; 1998-07-01 to 2009-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Constine  et al → Constine Inc; 1998-07-01 to 2009-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Constine Gravel Company → M52 PIT; 2009-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Constine → M52 PIT; 2009-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Constine → Constine Gravel Company; 2009-08-27 to current/open; source msha-controller-operator-history