# Relationship history for MSHA mine 2104048

Current hierarchy: **Douglas  Ims → Integrity Material Sales Inc → CR3 Screener**

- 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:** IMS CONTRACTING → CR3 Screener; 2023-04-05 to 2024-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Ims → CR3 Screener; 2023-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Ims → IMS CONTRACTING; 2023-04-05 to 2024-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Integrity Material Sales Inc → CR3 Screener; 2024-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Ims → CR3 Screener; 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