# Relationship history for MSHA mine 4202607

Current hierarchy: **Gary  Burningham; Jeff  Burningham → Burningham Enterprises, Inc. → Leamington Sand Pit**

- 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:** Jeff  Burningham et al → Leamington Sand Pit; 2009-10-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** WNW Mining Group → Leamington Sand Pit; 2013-08-01 to 2016-04-30; source msha-controller-operator-history
- **controller_controls_mine:** BD Mining et al → Leamington Sand Pit; 2013-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BD Mining et al → WNW Mining Group; 2013-08-01 to 2016-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Wagstaff Drill and Equipment et al → WNW Mining Group; 2013-08-01 to 2016-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Burningham Enterprises, Inc. → Leamington Sand Pit; 2016-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Burningham et al → Burningham Enterprises, Inc.; 2016-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Burningham et al → Burningham Enterprises, Inc.; 2016-05-01 to current/open; source msha-controller-operator-history