# Relationship history for MSHA mine 1202246

Current hierarchy: **Brooke  Shindler → BBS Sand & Gravel LLC → Lyon 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

- **operator_operates_mine:** Wilson Excavating → Lyon Pit; 1998-12-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Wilson → Lyon Pit; 1998-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Wilson → Wilson Excavating; 1998-12-01 to 2006-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Fremont Sand & Gravel LLC → Lyon Pit; 2007-01-01 to 2020-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Wilson → Lyon Pit; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Wilson → Fremont Sand & Gravel LLC; 2007-01-01 to 2020-04-30; source msha-controller-operator-history
- **operator_operates_mine:** BBS Sand & Gravel LLC → Lyon Pit; 2020-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brooke  Shindler → Lyon Pit; 2020-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brooke  Shindler → BBS Sand & Gravel LLC; 2020-05-01 to current/open; source msha-controller-operator-history