# Relationship history for MSHA mine 4103467

Current hierarchy: **Donna G Noyes → Oak Island Sand Products → SAND 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:** Oak Island Sand Company → SAND PIT #1; 1987-05-01 to 1991-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Steven  Marusich → SAND PIT #1; 1987-05-01 to 1991-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Marusich → Oak Island Sand Company; 1987-05-01 to 1991-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Oak Island Sand Products → SAND PIT #1; 1991-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donna G Noyes → SAND PIT #1; 1991-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna G Noyes → Oak Island Sand Products; 1991-10-10 to current/open; source msha-controller-operator-history