# Relationship history for MSHA mine 4703671

Current hierarchy: **Terrance  Pecha; Jeffrey  Antczak; Paul  Mumm → Blue Diamond Proppants, LLC → Clinton Dry 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

- **controller_controls_mine:** Insight Equity et al → Clinton Dry Plant; 2008-06-21 to 2019-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Superior Silica Sands LLC → Clinton Dry Plant; 2012-10-03 to 2022-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Insight Equity et al → Superior Silica Sands LLC; 2012-10-03 to 2019-12-09; source msha-controller-operator-history
- **controller_controls_mine:** HPS Investment Partners et al → Clinton Dry Plant; 2019-12-10 to 2025-12-15; source msha-controller-operator-history
- **controller_controls_operator:** HPS Investment Partners et al → Superior Silica Sands LLC; 2019-12-10 to 2022-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Oak Hill Advisors et al → Superior Silica Sands LLC; 2019-12-10 to 2022-05-08; source msha-controller-operator-history
- **controller_controls_operator:** PIMCO et al → Superior Silica Sands LLC; 2019-12-10 to 2022-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Blue Diamond Proppants, LLC → Clinton Dry Plant; 2022-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terrance  Pecha et al → Clinton Dry Plant; 2022-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terrance  Pecha et al → Blue Diamond Proppants, LLC; 2022-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Mumm et al → Blue Diamond Proppants, LLC; 2022-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Antczak et al → Blue Diamond Proppants, LLC; 2022-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Iron Oak Energy Solutions LLC → Clinton Dry Plant; 2025-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iron Oak Energy Solutions LLC → Superior Silica Sands LLC; 2025-12-16 to 2022-05-08; source msha-controller-operator-history