# Relationship history for MSHA mine 3503365

Current hierarchy: **Jerome J  Collman → RD MAC INC → Sackos Pit**

- 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:** Jerome J  Collman → Sackos Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sackos Excavating Inc → Sackos Pit; 1992-02-01 to 1998-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Alex  Sackos → Sackos Pit; 1992-02-01 to 1998-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Alex  Sackos → Sackos Excavating Inc; 1992-02-01 to 1998-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Britt Sand & Gravel → Sackos Pit; 1998-03-09 to 2020-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Britt → Sackos Pit; 1998-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Britt → Britt Sand & Gravel; 1998-03-09 to 2020-01-31; source msha-controller-operator-history
- **operator_operates_mine:** RD MAC INC → Sackos Pit; 2020-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerome J  Collman → RD MAC INC; 2020-02-01 to current/open; source msha-controller-operator-history