# Relationship history for MSHA mine 2002839

Current hierarchy: **Mike  Constine; Mark  Constine; Rod  Constine → Dale Constine & Sons Inc → OVID 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:** Mike  Constine  et al → OVID PIT; 1986-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dale Constine & Sons Inc → OVID PIT; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Constine  et al → Dale Constine & Sons Inc; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Constine  et al → Dale Constine & Sons Inc; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rod  Constine  et al → Dale Constine & Sons Inc; 1990-03-01 to current/open; source msha-controller-operator-history