# Relationship history for MSHA mine 3003222

Current hierarchy: **Kyler  Piasecki → Kyler Piasecki → Marsh Pond 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:** Herbert C Kilmer → Marsh Pond Quarry; 1998-06-01 to 2025-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Herbert C Kilmer → Marsh Pond Quarry; 1998-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herbert C Kilmer → Herbert C Kilmer; 1998-06-01 to 2025-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Kyler Piasecki → Marsh Pond Quarry; 2025-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kyler  Piasecki → Marsh Pond Quarry; 2025-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyler  Piasecki → Kyler Piasecki; 2025-03-26 to current/open; source msha-controller-operator-history