# Relationship history for MSHA mine 2003462

Current hierarchy: **Bennie W Sackrider Jr. → Sackrider Maintenance and Excavating Services LLC → Portable Washing Unit**

- 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:** Ben  Sackrider → Portable Washing Unit; 1994-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sackrider Construction Services LLC → Portable Washing Unit; 2012-08-29 to 2021-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Ben  Sackrider → Sackrider Construction Services LLC; 2012-08-29 to 2021-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Sackrider Maintenance and Excavating Services LLC → Portable Washing Unit; 2021-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bennie W Sackrider Jr. → Portable Washing Unit; 2021-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennie W Sackrider Jr. → Sackrider Maintenance and Excavating Services LLC; 2021-07-15 to current/open; source msha-controller-operator-history