# Relationship history for MSHA mine 5001610

Current hierarchy: **Frank  Arriaga → Marcenco → Ugadaga Quarry**

- 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:** Donald M  March et al → Ugadaga Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilder Construction Company → Ugadaga Quarry; 1993-05-01 to 1996-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Donald M  March et al → Wilder Construction Company; 1993-05-01 to 1996-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Marcenco → Ugadaga Quarry; 1996-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Arriaga → Ugadaga Quarry; 1996-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Arriaga → Marcenco; 1996-07-15 to current/open; source msha-controller-operator-history