# Relationship history for MSHA mine 3503720

Current hierarchy: **Carl G  Adams → BoJac Inc → Pioneer**

- 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:** Walter J  Nelson → Pioneer; 1994-03-01 to 2009-07-07; source msha-controller-operator-history
- **operator_operates_mine:** BoJac Inc → Pioneer; 2009-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl G  Adams → Pioneer; 2009-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl G  Adams → BoJac Inc; 2009-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter J  Nelson → BoJac Inc; 2009-07-08 to 2009-07-07; source msha-controller-operator-history