# Relationship history for MSHA mine 1103143

Current hierarchy: **CBR Investments, LLC; CBR Investments II, LLC → Knight Hawk Coal, LLC → Prairie Eagle**

- 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

- **controller_controls_mine:** Franklin D  Robertson  et al → Prairie Eagle; 1998-03-01 to 2012-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Knight Hawk Coal, LLC → Prairie Eagle; 2005-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Franklin D  Robertson  et al → Knight Hawk Coal, LLC; 2005-01-01 to 2012-05-31; source msha-controller-operator-history
- **controller_controls_operator:** James O  Bunn  et al → Knight Hawk Coal, LLC; 2005-01-01 to 2012-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Franklin D.  Robertson et al → Prairie Eagle; 2012-06-01 to 2021-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Franklin D.  Robertson et al → Knight Hawk Coal, LLC; 2012-06-01 to 2021-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Arch Coal Inc. et al → Knight Hawk Coal, LLC; 2012-06-01 to 2021-01-03; source msha-controller-operator-history
- **controller_controls_operator:** James O.  Bunn et al → Knight Hawk Coal, LLC; 2012-06-01 to 2021-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Arch Coal Inc et al → Prairie Eagle; 2021-01-04 to 2021-11-16; source msha-controller-operator-history
- **controller_controls_operator:** Arch Coal Inc et al → Knight Hawk Coal, LLC; 2021-01-04 to 2021-11-16; source msha-controller-operator-history
- **controller_controls_operator:** CBR Investments LLC et al → Knight Hawk Coal, LLC; 2021-01-04 to 2021-11-16; source msha-controller-operator-history
- **controller_controls_mine:** CBR Investments, LLC et al → Prairie Eagle; 2021-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CBR Investments, LLC et al → Knight Hawk Coal, LLC; 2021-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CBR Investments II, LLC et al → Knight Hawk Coal, LLC; 2021-11-17 to current/open; source msha-controller-operator-history