# Relationship history for MSHA mine 3304293

Current hierarchy: **Waste Management Inc → American Landfill, Inc. → American Landfill, Inc.**

- 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

- **operator_operates_mine:** American Landfill Inc → American Landfill, Inc.; 1993-01-01 to 1998-07-14; source msha-controller-operator-history
- **controller_controls_mine:** American Waste Services Inc → American Landfill, Inc.; 1993-01-01 to 1998-07-14; source msha-controller-operator-history
- **controller_controls_operator:** American Waste Services Inc → American Landfill Inc; 1993-01-01 to 1998-07-14; source msha-controller-operator-history
- **operator_operates_mine:** American Landfill, Inc. → American Landfill, Inc.; 1998-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Waste Management Inc → American Landfill, Inc.; 1998-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waste Management Inc → American Landfill, Inc.; 1998-07-15 to current/open; source msha-controller-operator-history