# Relationship history for MSHA mine 1800753

Current hierarchy: **Jeremy J  Preston → BEDROCK ENTERPRISES, INC → BEDROCK ENTERPRISES INC**

- 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 Enterprises, Inc → BEDROCK ENTERPRISES INC; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeremy J  Preston → BEDROCK ENTERPRISES INC; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeremy J  Preston → Bedrock Enterprises, Inc; 2001-07-01 to current/open; source msha-controller-operator-history