# Relationship history for MSHA mine 0901246

Current hierarchy: **Benjamin C  Cranford → C and H Paving--Mining Division → Culverton Quarry**

- 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:** C and H Paving--Mining Division → Culverton Quarry; 2018-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin C  Cranford → Culverton Quarry; 2018-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin C  Cranford → C and H Paving--Mining Division; 2018-10-18 to current/open; source msha-controller-operator-history