# Relationship history for MSHA mine 3601724

Current hierarchy: **PT BUMA Internasional Grup Tbk → Coal Contractors (1991) Inc → Coal Contractors Prep Facilities**

- 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:** Gowen Coal Company → Coal Contractors Prep Facilities; 1950-01-01 to 1982-08-24; source msha-controller-operator-history
- **controller_controls_mine:** David M  Yamulla → Coal Contractors Prep Facilities; 1950-01-01 to 1982-08-24; source msha-controller-operator-history
- **controller_controls_operator:** David M  Yamulla → Gowen Coal Company; 1950-01-01 to 1982-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Coal Contractors Inc → Coal Contractors Prep Facilities; 1982-08-25 to 1995-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Anglo United PLC → Coal Contractors Prep Facilities; 1982-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anglo United PLC → Coal Contractors Inc; 1982-08-25 to 1995-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Bell Denis Inc → Coal Contractors Prep Facilities; 1992-10-26 to 2003-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Coal Contractors (1991) Inc → Coal Contractors Prep Facilities; 1995-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bell Denis Inc → Coal Contractors (1991) Inc; 1995-07-12 to 2003-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Pen Carb Incorporated → Coal Contractors Prep Facilities; 2003-05-01 to 2007-11-12; source msha-controller-operator-history
- **controller_controls_operator:** Pen Carb Incorporated → Coal Contractors (1991) Inc; 2003-05-01 to 2007-11-12; source msha-controller-operator-history
- **controller_controls_mine:** Atlantic Carbon Group PLC → Coal Contractors Prep Facilities; 2007-11-13 to 2020-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Atlantic Carbon Group PLC → Coal Contractors (1991) Inc; 2007-11-13 to 2020-07-16; source msha-controller-operator-history
- **controller_controls_mine:** ACG Holdco LLC → Coal Contractors Prep Facilities; 2020-07-17 to 2024-06-25; source msha-controller-operator-history
- **controller_controls_operator:** ACG Holdco LLC → Coal Contractors (1991) Inc; 2020-07-17 to 2024-06-25; source msha-controller-operator-history
- **controller_controls_mine:** PT BUMA Internasional Grup Tbk → Coal Contractors Prep Facilities; 2024-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** PT BUMA Internasional Grup Tbk → Coal Contractors (1991) Inc; 2024-06-26 to current/open; source msha-controller-operator-history