# Relationship history for MSHA mine 3800760

Current hierarchy: **James  Grant → Knights Materials LLC → 1080 Summers Drive South**

- 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:** James O  Murray Jr → 1080 Summers Drive South; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Murray Mines, Inc. → 1080 Summers Drive South; 2022-04-19 to 2025-10-12; source msha-controller-operator-history
- **controller_controls_operator:** James O  Murray Jr → Murray Mines, Inc.; 2022-04-19 to 2025-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Knights Materials LLC → 1080 Summers Drive South; 2025-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Grant → 1080 Summers Drive South; 2025-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Grant → Knights Materials LLC; 2025-10-13 to current/open; source msha-controller-operator-history