# Relationship history for MSHA mine 4702797

Current hierarchy: **Kacvinsky William → Ashland Construction Company Inc → Pioneer Pits**

- 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

- **controller_controls_mine:** Kacvinsky William → Pioneer Pits; 1984-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ashland Construction Company Inc → Pioneer Pits; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kacvinsky William → Ashland Construction Company Inc; 1985-07-01 to current/open; source msha-controller-operator-history