# Relationship history for MSHA mine 2500319

Current hierarchy: **Larry  Paulsen → Paulsen Inc → Overton 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

- **controller_controls_mine:** Lance  Paulson → Overton Pit; 1950-01-01 to 1993-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Sawyer Sand & Gravel Inc → Overton Pit; 1950-01-01 to 1986-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Boldt Gary P → Overton Pit; 1950-01-01 to 1986-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Boldt Gary P → Sawyer Sand & Gravel Inc; 1950-01-01 to 1986-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Paulsen Inc → Overton Pit; 1986-04-23 to 1993-01-24; source msha-controller-operator-history
- **controller_controls_operator:** Lance  Paulson → Paulsen Inc; 1986-04-23 to 1993-01-24; source msha-controller-operator-history
- **operator_operates_mine:** Paulsen Inc → Overton Pit; 1993-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Paulsen et al → Overton Pit; 1993-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Paulsen et al → Paulsen Inc; 1993-01-25 to current/open; source msha-controller-operator-history