# Relationship history for MSHA mine 3000890

Current hierarchy: **Daniel J  Aikens → Aikens Const of Rome Inc → Hanicker Bros Sand & Gravel**

- 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:** Hanicker Brothers Sand & Gravel → Hanicker Bros Sand & Gravel; 1950-01-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles J  Richards → Hanicker Bros Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles J  Richards → Hanicker Brothers Sand & Gravel; 1950-01-01 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Aikens Const of Rome Inc → Hanicker Bros Sand & Gravel; 2003-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel J  Aikens → Hanicker Bros Sand & Gravel; 2003-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel J  Aikens → Aikens Const of Rome Inc; 2003-04-01 to current/open; source msha-controller-operator-history