# Relationship history for MSHA mine 4405605

Current hierarchy: **Thomas R  Hamilton → Nally & Hamilton Enterprises Inc. → Mayflower Preparation 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

- **controller_controls_mine:** Thomas R  Hamilton et al → Mayflower Preparation Plant; 1974-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Powell Mountain Coal Company Inc → Mayflower Preparation Plant; 1981-03-01 to 1997-09-24; source msha-controller-operator-history
- **controller_controls_mine:** Amvest Corporation → Mayflower Preparation Plant; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amvest Corporation → Powell Mountain Coal Company Inc; 1981-03-01 to 1997-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Powell Mountain Coal Company Inc → Mayflower Preparation Plant; 1997-09-25 to 2000-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Mayflower Preparation Plant; 1997-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Powell Mountain Coal Company Inc; 1997-09-25 to 2000-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Powell Mountain Coal Co. Inc → Mayflower Preparation Plant; 2000-11-30 to 2008-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Progress Energy Inc → Mayflower Preparation Plant; 2000-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Progress Energy Inc → Powell Mountain Coal Co. Inc; 2000-11-30 to 2008-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Powell Mountain Energy LLC → Mayflower Preparation Plant; 2008-03-07 to 2021-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Karat Acquisition LLC → Mayflower Preparation Plant; 2008-03-07 to 2008-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Karat Acquisition LLC → Powell Mountain Energy LLC; 2008-03-07 to 2008-05-26; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Mayflower Preparation Plant; 2008-05-27 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Powell Mountain Energy LLC; 2008-05-27 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Mayflower Preparation Plant; 2011-06-15 to 2017-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Powell Mountain Energy LLC; 2011-06-15 to 2017-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → Mayflower Preparation Plant; 2017-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Powell Mountain Energy LLC; 2017-09-14 to 2021-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Nally & Hamilton Enterprises Inc. → Mayflower Preparation Plant; 2021-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas R  Hamilton et al → Nally & Hamilton Enterprises Inc.; 2021-04-15 to current/open; source msha-controller-operator-history