# Relationship history for MSHA mine 1505183

Current hierarchy: **James B  Simpkins → Kentucky Select Inc → No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Blue Diamond Coal Company → No 1; 1950-01-01 to 1990-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Blue Diamond Coal Company → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blue Diamond Coal Company → Blue Diamond Coal Company; 1950-01-01 to 1990-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → No 1; 1987-05-18 to 2005-12-11; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland River Coal Company → No 1; 1990-10-08 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Cumberland River Coal Company; 1990-10-08 to 1992-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Georgetown Development Inc → No 1; 1992-06-01 to 1993-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Parsons Don → No 1; 1992-06-01 to 1993-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Parsons Don → Georgetown Development Inc; 1992-06-01 to 1993-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky Select Inc → No 1; 1993-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James B  Simpkins → No 1; 1993-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James B  Simpkins → Kentucky Select Inc; 1993-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → No 1; 2005-12-12 to 2017-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Cumberland River Coal Company; 2005-12-12 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → No 1; 2017-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Cumberland River Coal Company; 2017-09-14 to 1992-05-31; source msha-controller-operator-history