# Relationship history for MSHA mine 4105541

Current hierarchy: **Brett  Lappe → Lappe Sand and Gravel, LLC → Thomaston Plant**

- 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:** South Texas Materials, LLC → Thomaston Plant; 2021-01-13 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Clinton T Threadgill et al → Thomaston Plant; 2021-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clinton T Threadgill et al → South Texas Materials, LLC; 2021-01-13 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_operator:** James R Wood et al → South Texas Materials, LLC; 2021-01-13 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Allen D Bradley et al → South Texas Materials, LLC; 2021-01-13 to 2024-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Brett  Lappe → Thomaston Plant; 2023-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lappe Sand and Gravel, LLC → Thomaston Plant; 2024-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brett  Lappe → Lappe Sand and Gravel, LLC; 2024-04-15 to current/open; source msha-controller-operator-history