# Relationship history for MSHA mine 2700440

Current hierarchy: **Peckham Industries Inc → Peckham Materials Corp → Lancaster Plant 155**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Peckham Industries Inc → Lancaster Plant 155; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A.B. Excavating Inc. → Lancaster Plant 155; 2010-03-05 to 2025-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Allen  Bouthillier → Lancaster Plant 155; 2010-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Bouthillier → A.B. Excavating Inc.; 2010-03-05 to 2025-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Peckham Materials Corp → Lancaster Plant 155; 2025-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peckham Industries Inc → Peckham Materials Corp; 2025-06-03 to current/open; source msha-controller-operator-history