# Relationship history for MSHA mine 2002675

Current hierarchy: **Chris  Peyerk; James A Jacob → Mid Michigan Materials Bechtel → Bechtel 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:** Bechtel Sand & Gravel, LLC → Bechtel Pit; 1981-07-01 to 2018-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Bechtel et al → Bechtel Pit; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Bechtel et al → Bechtel Sand & Gravel, LLC; 1981-07-01 to 2018-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Mid Michigan Materials Bechtel → Bechtel Pit; 2018-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Peyerk et al → Bechtel Pit; 2018-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Peyerk et al → Mid Michigan Materials Bechtel; 2018-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A Jacob et al → Mid Michigan Materials Bechtel; 2018-03-01 to current/open; source msha-controller-operator-history