# Relationship history for MSHA mine 1102664

Current hierarchy: **Knight Hawk Holdings, LLC → ICG-Illinois, LLC → Viper Mine**

- 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:** Turris Coal Company → Viper Mine; 1979-02-01 to 1992-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Shell Oil Company → Viper Mine; 1979-02-01 to 1992-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Shell Oil Company → Turris Coal Company; 1979-02-01 to 1992-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Turris Coal Company → Viper Mine; 1992-10-06 to 1998-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Zeigler Coal Holding Company → Viper Mine; 1992-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zeigler Coal Holding Company → Turris Coal Company; 1992-10-06 to 1998-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Turris Coal Company → Viper Mine; 1998-09-02 to 2004-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Viper Mine; 1998-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Turris Coal Company; 1998-09-02 to 2004-09-29; source msha-controller-operator-history
- **operator_operates_mine:** ICG-Illinois, LLC → Viper Mine; 2004-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Viper Mine; 2004-09-30 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → ICG-Illinois, LLC; 2004-09-30 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Viper Mine; 2011-06-15 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → ICG-Illinois, LLC; 2011-06-15 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Knight Hawk Holdings, LLC → Viper Mine; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knight Hawk Holdings, LLC → ICG-Illinois, LLC; 2021-01-01 to current/open; source msha-controller-operator-history