# Relationship history for MSHA mine 4103414

Current hierarchy: **Eric  Reinhart → Cci Manufacturing → KEMP QUARRIES**

- 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:** Kemp Masonry Materials Inc → KEMP QUARRIES; 1986-04-01 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_mine:** W E  Kemp → KEMP QUARRIES; 1986-04-01 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_operator:** W E  Kemp → Kemp Masonry Materials Inc; 1986-04-01 to 1993-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Cci Manufacturing → KEMP QUARRIES; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric  Reinhart → KEMP QUARRIES; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric  Reinhart → Cci Manufacturing; 1993-11-01 to current/open; source msha-controller-operator-history