# Relationship history for MSHA mine 2001770

Current hierarchy: **Neadow Mike → Cooks Sand & Gravel → Neadow Pit**

- 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:** James Neadow-Owner → Neadow Pit; 1950-01-01 to 1979-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Neadow James → Neadow Pit; 1950-01-01 to 1979-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Neadow James → James Neadow-Owner; 1950-01-01 to 1979-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Cooks Sand & Gravel → Neadow Pit; 1979-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Neadow Mike → Neadow Pit; 1979-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neadow Mike → Cooks Sand & Gravel; 1979-06-04 to current/open; source msha-controller-operator-history