# Relationship history for MSHA mine 1518066

Current hierarchy: **Mcnic Pipeline & Processing Company & Earthco → Crc #1 Llc → Crc No 1 Llc**

- 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 → Crc No 1 Llc; 1998-05-01 to 1999-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Beard Company → Crc No 1 Llc; 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 #1 Llc → Crc No 1 Llc; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mcnic Pipeline & Processing Company & Earthco → Crc No 1 Llc; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mcnic Pipeline & Processing Company & Earthco → Crc #1 Llc; 1999-05-01 to current/open; source msha-controller-operator-history