# Relationship history for MSHA mine 1510833

Current hierarchy: **John  Harris → Mountain States Coal Corp → Mountain States Coal Corporation**

- 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

- **controller_controls_mine:** James W  Potter et al → Mountain States Coal Corporation; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Goff Sammy → Mountain States Coal Corporation; 1972-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Central Kentucky Landscaping Company → Mountain States Coal Corporation; 1976-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnson R B → Mountain States Coal Corporation; 1976-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alma Coal Corp → Mountain States Coal Corporation; 1977-04-01 to 1978-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Johnson R B → Alma Coal Corp; 1977-04-01 to 1978-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Shelby Fuel Corp → Mountain States Coal Corporation; 1978-03-14 to 1980-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Goff Sammy → Shelby Fuel Corp; 1978-03-14 to 1980-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Carter William B & David → Mountain States Coal Corporation; 1980-04-14 to 1983-03-20; source msha-controller-operator-history
- **operator_operates_mine:** L T Ruth Coal Company Inc → Mountain States Coal Corporation; 1980-08-28 to 1982-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Central Kentucky Landscaping Company → L T Ruth Coal Company Inc; 1980-08-28 to 1982-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Alma Coal Corp → Mountain States Coal Corporation; 1982-10-14 to 1983-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Carter William B & David → Alma Coal Corp; 1982-10-14 to 1983-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Alma Coal Corp → Mountain States Coal Corporation; 1983-03-17 to 1986-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Infinity Coal Corp → Mountain States Coal Corporation; 1983-03-17 to 1986-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Infinity Coal Corp → Alma Coal Corp; 1983-03-17 to 1986-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Potter Mining Company Inc → Mountain States Coal Corporation; 1986-01-21 to 1993-05-31; source msha-controller-operator-history
- **controller_controls_operator:** James W  Potter et al → Potter Mining Company Inc; 1986-01-21 to 1993-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Mountain States Coal Corp → Mountain States Coal Corporation; 1993-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Harris → Mountain States Coal Corporation; 1993-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Harris → Mountain States Coal Corp; 1993-06-01 to current/open; source msha-controller-operator-history