# Relationship history for MSHA mine 4608717

Current hierarchy: **John Joseph  Childress → R & D Coal Sales LLC → Bishop Plant**

- 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:** Beard Technologies Inc → Bishop Plant; 1998-05-01 to 1999-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Beard Company → Bishop Plant; 1998-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Beard Company → Beard Technologies Inc; 1998-05-01 to 1999-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Crc #3 Llc → Bishop Plant; 1999-05-01 to 2000-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Mcnic Pipeline & Processing Company & Earthco → Bishop Plant; 1999-05-01 to 2000-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Mcnic Pipeline & Processing Company & Earthco → Crc #3 Llc; 1999-05-01 to 2000-08-28; source msha-controller-operator-history
- **operator_operates_mine:** R & D Coal Sales LLC → Bishop Plant; 2000-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas R Hutchinson → Bishop Plant; 2000-08-29 to 2005-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Douglas R Hutchinson → R & D Coal Sales LLC; 2000-08-29 to 2005-01-13; source msha-controller-operator-history
- **controller_controls_mine:** John Joseph  Childress → Bishop Plant; 2005-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Joseph  Childress → R & D Coal Sales LLC; 2005-01-14 to current/open; source msha-controller-operator-history