# Relationship history for MSHA mine 3000994

Current hierarchy: **Brock J Mealer → Weber Sand & Gravel Inc → Weber R64d Pit And Plant**

- 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:** Weber Sand & Gravel Inc → Weber R64d Pit And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas G  Weber → Weber R64d Pit And Plant; 1950-01-01 to 2021-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Thomas G  Weber → Weber Sand & Gravel Inc; 1950-01-01 to 2021-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Brock J Mealer → Weber R64d Pit And Plant; 2021-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brock J Mealer → Weber Sand & Gravel Inc; 2021-02-15 to current/open; source msha-controller-operator-history