# Relationship history for MSHA mine 0801442

Current hierarchy: **Baker Aggregates Investments II LLC → Blue Water Industries Florida LLC → Lisbon Sand**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Blue Water Industries LLC → Lisbon Sand; 2022-10-12 to 2024-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Blue Water Industries Holdings LLC → Lisbon Sand; 2022-10-12 to 2024-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Blue Water Industries Holdings LLC → Blue Water Industries LLC; 2022-10-12 to 2024-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Lisbon Sand; 2024-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Blue Water Industries LLC; 2024-04-05 to 2024-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Blue Water Industries Florida LLC → Lisbon Sand; 2024-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baker Aggregates Investments II LLC → Lisbon Sand; 2024-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baker Aggregates Investments II LLC → Blue Water Industries Florida LLC; 2024-09-16 to current/open; source msha-controller-operator-history