# Relationship history for MSHA mine 3608264

Current hierarchy: **Jeff  Giblin → Krempasky Construction → Krempansky Construction**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Krempasky Construction → Krempansky Construction; 1991-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Krempasky → Krempansky Construction; 1991-06-01 to 2023-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Krempasky → Krempasky Construction; 1991-06-01 to 2023-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Giblin → Krempansky Construction; 2023-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Giblin → Krempasky Construction; 2023-06-25 to current/open; source msha-controller-operator-history