# Relationship history for MSHA mine 1511319

Current hierarchy: **Elmer S  Campbell; Paul W  Campbell → American Highwall Mining, LLC → AHM Tipple**

- 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:** TECO Energy Inc → AHM Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Resources & Energy Inc → AHM Tipple; 1976-05-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Plastics Universal Corp → AHM Tipple; 1978-05-01 to 1982-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Adams Resources & Energy Inc → Plastics Universal Corp; 1978-05-01 to 1982-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous-Laurel Mining Inc → AHM Tipple; 1982-06-22 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → AHM Tipple; 1982-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Bituminous-Laurel Mining Inc; 1982-06-22 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → AHM Tipple; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leeco Inc → AHM Tipple; 1986-01-01 to 1993-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Leeco Inc; 1986-01-01 to 1993-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Gatliff Coal Company Inc → AHM Tipple; 1993-05-07 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Gatliff Coal Company Inc; 1993-05-07 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul W  Campbell  et al → AHM Tipple; 2006-06-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Highwall Mining, LLC → AHM Tipple; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul W  Campbell  et al → American Highwall Mining, LLC; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmer S  Campbell  et al → American Highwall Mining, LLC; 2014-01-01 to current/open; source msha-controller-operator-history