# Relationship history for MSHA mine 1102820

Current hierarchy: **Simon G Bradley; Jonathon  Bradley → Boughton Materials of Illinois LLC → Pit  #2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Walter P Boughton Estate → Pit  #2; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Boughton Materials Inc → Pit  #2; 1985-02-01 to 2026-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Walter P Boughton Estate → Boughton Materials Inc; 1985-02-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Walter P Boughton Trust → Pit  #2; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter P Boughton Trust → Boughton Materials Inc; 2018-01-01 to 2026-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Jonathon  Bradley et al → Pit  #2; 2023-02-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boughton Materials of Illinois LLC → Pit  #2; 2026-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jonathon  Bradley et al → Boughton Materials of Illinois LLC; 2026-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Simon G Bradley et al → Boughton Materials of Illinois LLC; 2026-04-02 to current/open; source msha-controller-operator-history