# Relationship history for MSHA mine 0404618

Current hierarchy: **Eugene B  Ceccotti → Valley Rock Products → Valley Rock Products - Willows**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Lawrence M  Beigh → Valley Rock Products - Willows; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley Rock Products Inc → Valley Rock Products - Willows; 1982-11-01 to 2003-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence M  Beigh → Valley Rock Products Inc; 1982-11-01 to 2003-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Valley Rock Products → Valley Rock Products - Willows; 2003-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shamrock Materials Inc → Valley Rock Products - Willows; 2003-05-12 to 2017-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Shamrock Materials Inc → Valley Rock Products; 2003-05-12 to 2017-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Eugene B  Ceccotti → Valley Rock Products - Willows; 2017-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eugene B  Ceccotti → Valley Rock Products; 2017-06-07 to current/open; source msha-controller-operator-history