# Relationship history for MSHA mine 3800758

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Southeast Agg Operations, LLC → Salem 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Lyniel Dean  Weaver → Salem Sand; 2022-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L. Dean Weaver Company LLC → Salem Sand; 2022-02-18 to 2023-04-02; source msha-controller-operator-history
- **controller_controls_operator:** Lyniel Dean  Weaver → L. Dean Weaver Company LLC; 2022-02-18 to 2023-04-02; source msha-controller-operator-history
- **controller_controls_mine:** Blue Water Industries Holdings LLC → Salem Sand; 2022-10-12 to 2024-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Blue Water Industries LLC → Salem Sand; 2023-04-03 to 2024-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Blue Water Industries Holdings LLC → Blue Water Industries LLC; 2023-04-03 to 2024-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Salem 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 2024-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Salem Sand; 2024-12-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Southeast Agg Operations, LLC → Salem Sand; 2025-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Southeast Agg Operations, LLC; 2025-01-01 to current/open; source msha-controller-operator-history