# Relationship history for MSHA mine 2104051

Current hierarchy: **Douglas  Ims → Integrity Material Sales Inc → CR4 CRUSHER**

- 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:** Douglas  Ims → CR4 CRUSHER; 2023-04-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** IMS Contracting → CR4 CRUSHER; 2023-05-12 to 2024-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Ims → IMS Contracting; 2023-05-12 to 2024-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Integrity Material Sales Inc → CR4 CRUSHER; 2024-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Ims → CR4 CRUSHER; 2024-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Ims → Integrity Material Sales Inc; 2024-03-26 to current/open; source msha-controller-operator-history