# Relationship history for MSHA mine 2500327

Current hierarchy: **Larry  Paulsen → Paulsen Inc → Odessa 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:** T & F Sand & Gravel Inc → Odessa Pit; 1950-01-01 to 2024-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Richard J  Follmer → Odessa Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard J  Follmer → T & F Sand & Gravel Inc; 1950-01-01 to 2024-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Paulsen et al → Odessa Pit; 1993-01-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Paulsen Inc → Odessa Pit; 2024-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Paulsen et al → Paulsen Inc; 2024-05-30 to current/open; source msha-controller-operator-history