# Relationship history for MSHA mine 4104659

Current hierarchy: **Alejandro  Delarosa; Anna Maria  Delarosa → DLR SANDSTONE LLC → Pit 1**

- 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:** Millsap Materials LLC → Pit 1; 2007-05-03 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Justin L.  Russell et al → Pit 1; 2007-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin L.  Russell et al → Millsap Materials LLC; 2007-05-03 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Mejia et al → Millsap Materials LLC; 2007-05-03 to 2020-05-31; source msha-controller-operator-history
- **operator_operates_mine:** DLR SANDSTONE LLC → Pit 1; 2020-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alejandro  Delarosa et al → Pit 1; 2020-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alejandro  Delarosa et al → DLR SANDSTONE LLC; 2020-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anna Maria  Delarosa et al → DLR SANDSTONE LLC; 2020-06-01 to current/open; source msha-controller-operator-history