# Relationship history for MSHA mine 4503794

Current hierarchy: **Sterling  Griffin → Harbor Custom Homes Inc → Harbor Custom Homes Screen**

- 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

- **controller_controls_mine:** Sterling  Griffin → Harbor Custom Homes Screen; 2018-03-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harbor Custom Homes Inc → Harbor Custom Homes Screen; 2019-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sterling  Griffin → Harbor Custom Homes Inc; 2019-05-06 to current/open; source msha-controller-operator-history