# Relationship history for MSHA mine 1302435

Current hierarchy: **Joshua Corey  Kratofil → Cantera Aggregates, LLC → Portable Crusher #1**

- 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:** Advanced Aggregate Inc. → Portable Crusher #1; 2012-07-16 to 2013-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Ronald E  Swan et al → Portable Crusher #1; 2012-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  Swan et al → Advanced Aggregate Inc.; 2012-07-16 to 2013-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Douglas K  Thornburg et al → Advanced Aggregate Inc.; 2012-07-16 to 2013-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Aggregates, Inc → Portable Crusher #1; 2013-05-20 to 2017-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Darrell J  Coddington → Portable Crusher #1; 2013-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell J  Coddington → Cantera Aggregates, Inc; 2013-05-20 to 2017-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Aggregates, LLC → Portable Crusher #1; 2017-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joshua Corey  Kratofil → Portable Crusher #1; 2017-10-11 to 2022-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Joshua Corey  Kratofil → Cantera Aggregates, LLC; 2017-10-11 to 2022-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Joshua C Kratofil et al → Portable Crusher #1; 2022-05-23 to 2024-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Joshua C Kratofil et al → Cantera Aggregates, LLC; 2022-05-23 to 2024-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Justin A Kratofil et al → Cantera Aggregates, LLC; 2022-05-23 to 2024-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Joshua Corey  Kratofil → Portable Crusher #1; 2024-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua Corey  Kratofil → Cantera Aggregates, LLC; 2024-06-24 to current/open; source msha-controller-operator-history