# Relationship history for MSHA mine 1503013

Current hierarchy: **Harris B W → D & E Coal Company 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Canada Donnie → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Canada Coal Company Inc → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lewis & Frank Coal Company → No 1; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Runyon Lewis → No 1; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Runyon Lewis → Lewis & Frank Coal Company; 1950-01-01 to 1973-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Elkhorn Creek Coal Company Inc → No 1; 1974-01-01 to 1977-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Canada Donnie → Elkhorn Creek Coal Company Inc; 1974-01-01 to 1977-05-18; source msha-controller-operator-history
- **operator_operates_mine:** D & E Coal Company Inc → No 1; 1977-05-19 to 1980-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Noe Diane Canada → No 1; 1977-05-19 to 1980-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Noe Diane Canada → D & E Coal Company Inc; 1977-05-19 to 1980-02-27; source msha-controller-operator-history
- **operator_operates_mine:** D & E Coal Company Inc → No 1; 1980-02-28 to 1990-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Canada Coal Company Inc → No 1; 1980-02-28 to 1990-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Canada Coal Company Inc → D & E Coal Company Inc; 1980-02-28 to 1990-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Rod Blackburn Coal Company Inc → No 1; 1990-06-01 to 1990-11-28; source msha-controller-operator-history
- **controller_controls_mine:** Blackburn Roger → No 1; 1990-06-01 to 1990-11-28; source msha-controller-operator-history
- **controller_controls_operator:** Blackburn Roger → Rod Blackburn Coal Company Inc; 1990-06-01 to 1990-11-28; source msha-controller-operator-history
- **operator_operates_mine:** Canada Coal Company Inc → No 1; 1990-11-29 to 1992-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Canada Coal Company Inc → Canada Coal Company Inc; 1990-11-29 to 1992-01-12; source msha-controller-operator-history
- **operator_operates_mine:** D & E Coal Company Inc → No 1; 1992-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harris B W → No 1; 1992-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris B W → D & E Coal Company Inc; 1992-01-13 to current/open; source msha-controller-operator-history