# Relationship history for MSHA mine 2800565

Current hierarchy: **John  Paz → Logan Sand & Gravel Inc → LOGAN LAKE**

- 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:** Wenonah Sand & Gravel Company Inc → LOGAN LAKE; 1950-01-01 to 1979-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Nick  Nicolaisen → LOGAN LAKE; 1950-01-01 to 1979-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Nick  Nicolaisen → Wenonah Sand & Gravel Company Inc; 1950-01-01 to 1979-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Logan Sand & Gravel Inc → LOGAN LAKE; 1979-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Paz → LOGAN LAKE; 1979-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Paz → Logan Sand & Gravel Inc; 1979-07-01 to current/open; source msha-controller-operator-history