# Relationship history for MSHA mine 2100034

Current hierarchy: **Remortel Jack Van → Kappers Aggregates Inc → Rifle Hill Quarry**

- 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:** Kappers Construction Company Inc → Rifle Hill Quarry; 1950-01-01 to 1986-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Kappers Larry D → Rifle Hill Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kappers Larry D → Kappers Construction Company Inc; 1950-01-01 to 1986-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Remortel Jack Van → Rifle Hill Quarry; 1986-05-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kappers Aggregates Inc → Rifle Hill Quarry; 1986-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Remortel Jack Van → Kappers Aggregates Inc; 1986-05-15 to current/open; source msha-controller-operator-history