# Relationship history for MSHA mine 3001999

Current hierarchy: **Peckham Industries Inc → E Tetz & Sons LLC → E Tetz & Sons Inc Bloomingburg Sand & Gr**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** E Tetz & Sons LLC → E Tetz & Sons Inc Bloomingburg Sand & Gr; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward  Tetz Jr → E Tetz & Sons Inc Bloomingburg Sand & Gr; 1950-01-01 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Tetz Jr → E Tetz & Sons LLC; 1950-01-01 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Peckham Industries Inc → E Tetz & Sons Inc Bloomingburg Sand & Gr; 2023-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peckham Industries Inc → E Tetz & Sons LLC; 2023-06-01 to current/open; source msha-controller-operator-history