# Relationship history for MSHA mine 0901216

Current hierarchy: **First Bauxite LLC → US Ceramics LLC → Wrens 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:** PyraMax Ceramics Southeast, LLC → Wrens Plant; 2012-04-12 to 2019-04-21; source msha-controller-operator-history
- **controller_controls_mine:** PyraMax Ceramics, LLC → Wrens Plant; 2012-04-12 to 2013-05-02; source msha-controller-operator-history
- **controller_controls_operator:** PyraMax Ceramics, LLC → PyraMax Ceramics Southeast, LLC; 2012-04-12 to 2013-05-02; source msha-controller-operator-history
- **controller_controls_mine:** Imerys S A → Wrens Plant; 2013-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → PyraMax Ceramics Southeast, LLC; 2013-05-03 to 2019-04-21; source msha-controller-operator-history
- **operator_operates_mine:** US Ceramics LLC → Wrens Plant; 2019-04-22 to 2022-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Burgess et al → Wrens Plant; 2019-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Burgess et al → US Ceramics LLC; 2019-04-22 to 2022-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Pearson et al → US Ceramics LLC; 2019-04-22 to 2022-03-28; source msha-controller-operator-history
- **operator_operates_mine:** US Ceramics LLC → Wrens Plant; 2022-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** First Bauxite LLC → Wrens Plant; 2022-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** First Bauxite LLC → US Ceramics LLC; 2022-03-29 to current/open; source msha-controller-operator-history