# Relationship history for MSHA mine 2103724

Current hierarchy: **Richard R  Grand → Richard R Grand → Sheryls Const., Inc.**

- 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:** Richard R Grand → Sheryls Const., Inc.; 2011-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard R  Grand → Sheryls Const., Inc.; 2011-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard R  Grand → Richard R Grand; 2011-02-02 to current/open; source msha-controller-operator-history