# Relationship history for MSHA mine 2302049

Current hierarchy: **BMC Enterprises Inc → MC Materials, LLC → S & S QUARRIES**

- 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

- **controller_controls_mine:** Adkisson Randy B → S & S QUARRIES; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & S Quarries Inc → S & S QUARRIES; 1991-12-01 to 2021-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Adkisson Randy B → S & S Quarries Inc; 1991-12-01 to 2021-12-30; source msha-controller-operator-history
- **operator_operates_mine:** MC Materials, LLC → S & S QUARRIES; 2021-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** MC-HVP Inc et al → S & S QUARRIES; 2021-12-31 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_operator:** MC-HVP Inc et al → MC Materials, LLC; 2021-12-31 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Holdings et al → MC Materials, LLC; 2021-12-31 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_mine:** BMC Enterprises Inc → S & S QUARRIES; 2024-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BMC Enterprises Inc → MC Materials, LLC; 2024-04-26 to current/open; source msha-controller-operator-history