# Relationship history for MSHA mine 2003516

Current hierarchy: **Chris  Peyerk; James A Jacob → Mid Michigan Materials Burgess → Burgess 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:** Burgess contracting → Burgess Pit; 2015-08-10 to 2018-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Timothy Fredrick  Burgess → Burgess Pit; 2015-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy Fredrick  Burgess → Burgess contracting; 2015-08-10 to 2018-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Mid Michigan Materials Burgess → Burgess Pit; 2018-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A Jacob et al → Burgess Pit; 2018-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A Jacob et al → Mid Michigan Materials Burgess; 2018-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Peyerk et al → Mid Michigan Materials Burgess; 2018-06-18 to current/open; source msha-controller-operator-history