# Relationship history for MSHA mine 2000872

Current hierarchy: **Chris  Peyerk; James A Jacob → Mid Michigan Materials Vella Pit → Vella 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:** Washtenaw Sand & Gravel → Vella Pit; 1950-01-01 to 2020-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Edward S  Vella et al → Vella Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward S  Vella et al → Washtenaw Sand & Gravel; 1950-01-01 to 2020-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Thomas V  Vella et al → Washtenaw Sand & Gravel; 1950-01-01 to 2020-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Mid Michigan Materials Vella Pit → Vella Pit; 2020-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A Jacob et al → Vella Pit; 2020-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A Jacob et al → Mid Michigan Materials Vella Pit; 2020-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Peyerk et al → Mid Michigan Materials Vella Pit; 2020-08-19 to current/open; source msha-controller-operator-history