# Relationship history for MSHA mine 1901305

Current hierarchy: **Mark  Roukous → New Heights Builders of MA LLC → Howard St**

- 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:** New Heights Builders of MA LLC → Howard St; 2022-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Roukous → Howard St; 2022-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Roukous → New Heights Builders of MA LLC; 2022-03-23 to current/open; source msha-controller-operator-history