# Relationship history for MSHA mine 4103784

Current hierarchy: **Pablo  Rojas → Artesian Materials Inc → Humble Plant #3**

- 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:** Don Schneider Material Company → Humble Plant #3; 1993-07-01 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Don  Schneider → Humble Plant #3; 1993-07-01 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Don  Schneider → Don Schneider Material Company; 1993-07-01 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Denise  Schneider → Humble Plant #3; 1995-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dds Aggregates Inc → Humble Plant #3; 1997-01-01 to 2003-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Denise  Schneider → Dds Aggregates Inc; 1997-01-01 to 2003-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Artesian Materials Inc → Humble Plant #3; 2003-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pablo  Rojas → Humble Plant #3; 2003-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pablo  Rojas → Artesian Materials Inc; 2003-08-18 to current/open; source msha-controller-operator-history