# Relationship history for MSHA mine 1101081

Current hierarchy: **Everett  Lawrence → Lawrence Gravel Inc → Lawrence Gravel, Inc. #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

- **operator_operates_mine:** Danville Shale Company Inc → Lawrence Gravel, Inc. #2; 1950-01-01 to 1983-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Charles R  Gray → Lawrence Gravel, Inc. #2; 1950-01-01 to 1983-06-02; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Gray → Danville Shale Company Inc; 1950-01-01 to 1983-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Everett  Lawrence → Lawrence Gravel, Inc. #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lawrence Gravel Inc → Lawrence Gravel, Inc. #2; 1983-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everett  Lawrence → Lawrence Gravel Inc; 1983-06-03 to current/open; source msha-controller-operator-history