# Relationship history for MSHA mine 3608265

Current hierarchy: **Flintstone LLC → Bedrock Quarries Inc → Bedrock 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:** Bedrock Quarries Inc → Bedrock Quarry; 1991-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roloson Berton & Heather → Bedrock Quarry; 1991-06-01 to 2004-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Roloson Berton & Heather → Bedrock Quarries Inc; 1991-06-01 to 2004-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Flintstone LLC → Bedrock Quarry; 2004-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Flintstone LLC → Bedrock Quarries Inc; 2004-04-05 to current/open; source msha-controller-operator-history