# Relationship history for MSHA mine 3001711

Current hierarchy: **Robert C Colarusso Jr; Paul A Colarusso → COLARUSSO SAND & GRAVEL CO → KEARNEY 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:** Colarusso Sand & Gravel Co → KEARNEY PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Colarusso → KEARNEY PIT; 1950-01-01 to 2014-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Colarusso → Colarusso Sand & Gravel Co; 1950-01-01 to 2014-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Paul A Colarusso et al → KEARNEY PIT; 2014-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul A Colarusso et al → Colarusso Sand & Gravel Co; 2014-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C Colarusso Jr et al → Colarusso Sand & Gravel Co; 2014-03-14 to current/open; source msha-controller-operator-history