# Relationship history for MSHA mine 1505406

Current hierarchy: **Rhino Resource Partners LP → CAM Mining LLC → Chapperal  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:** Chapperal Coal Corp → Chapperal  Plant; 1950-01-01 to 1978-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Nick A  Cooley et al → Chapperal  Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nick A  Cooley et al → Chapperal Coal Corp; 1950-01-01 to 1978-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Costain Group PLC → Chapperal  Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Costain Coal Inc → Chapperal  Plant; 1978-10-05 to 1997-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Costain Coal Inc; 1978-10-05 to 1997-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Iracoal Incorporated → Chapperal  Plant; 1997-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lodestar Energy, Inc → Chapperal  Plant; 1997-07-21 to 2003-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Iracoal Incorporated → Lodestar Energy, Inc; 1997-07-21 to 2003-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Wexford Capital LLC → Chapperal  Plant; 2003-05-12 to 2010-10-04; source msha-controller-operator-history
- **operator_operates_mine:** CAM Mining LLC → Chapperal  Plant; 2003-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wexford Capital LLC → CAM Mining LLC; 2003-05-29 to 2010-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Rhino Resource Partners LP → Chapperal  Plant; 2010-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rhino Resource Partners LP → CAM Mining LLC; 2010-10-05 to current/open; source msha-controller-operator-history