# Relationship history for MSHA mine 2000698

Current hierarchy: **GFL Environmental Inc → GFL Environmental USA, Inc. → Newark Aggregate & Landscape Supply 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:** Corey & Hartwig Inc → Newark Aggregate & Landscape Supply Inc; 1950-01-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Hartwig → Newark Aggregate & Landscape Supply Inc; 1950-01-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Hartwig → Corey & Hartwig Inc; 1950-01-01 to 1989-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Newark Gravel Company → Newark Aggregate & Landscape Supply Inc; 1989-04-01 to 2005-04-03; source msha-controller-operator-history
- **controller_controls_mine:** Frederick  Schenkel → Newark Aggregate & Landscape Supply Inc; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frederick  Schenkel → Newark Gravel Company; 1989-04-01 to 2005-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Newark Aggregate & Landscape Supply Inc → Newark Aggregate & Landscape Supply Inc; 2005-04-04 to 2017-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Mullins → Newark Aggregate & Landscape Supply Inc; 2005-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Mullins → Newark Aggregate & Landscape Supply Inc; 2005-04-04 to 2017-06-08; source msha-controller-operator-history
- **operator_operates_mine:** GFL Environmental USA, Inc. → Newark Aggregate & Landscape Supply Inc; 2017-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** GFL Environmental Inc → Newark Aggregate & Landscape Supply Inc; 2017-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** GFL Environmental Inc → GFL Environmental USA, Inc.; 2017-06-09 to current/open; source msha-controller-operator-history