# Relationship history for MSHA mine 1103018

Current hierarchy: **Simonds Group LTD → Kinkaid Stone Company → KINKAID UNDERGROUND**

- 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:** Pautler Brothers Contractors Inc → KINKAID UNDERGROUND; 1978-03-09 to 1999-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Kinkaid Stone Company → KINKAID UNDERGROUND; 1997-12-01 to 1999-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Pautler Brothers Contractors Inc → Kinkaid Stone Company; 1997-12-01 to 1999-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Kinkaid Stone Company → KINKAID UNDERGROUND; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward T  Simonds et al → KINKAID UNDERGROUND; 1999-06-01 to 2025-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Edward T  Simonds et al → Kinkaid Stone Company; 1999-06-01 to 2025-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Simonds Group LTD → KINKAID UNDERGROUND; 2025-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Simonds Group LTD → Kinkaid Stone Company; 2025-01-03 to current/open; source msha-controller-operator-history