# Relationship history for MSHA mine 1202467

Current hierarchy: **RR Holdco, Inc. → Singleton Stone, LLC → South Lake Stone**

- 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:** Singleton Stone, LLC → South Lake Stone; 2015-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Meridian Materials LLC et al → South Lake Stone; 2015-06-24 to 2024-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Meridian Materials LLC et al → Singleton Stone, LLC; 2015-06-24 to 2024-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Rieth Riley Const Co Inc et al → Singleton Stone, LLC; 2015-06-24 to 2024-12-22; source msha-controller-operator-history
- **controller_controls_mine:** RR Holdco, Inc. → South Lake Stone; 2024-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RR Holdco, Inc. → Singleton Stone, LLC; 2024-12-23 to current/open; source msha-controller-operator-history