# Relationship history for MSHA mine 4104312

Current hierarchy: **Allan Douglas  Meador → Premier Sand and Stone LLC → Premier Sand and Stone LLC**

- 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:** Texas Sports Sands, Inc. → Premier Sand and Stone LLC; 2001-08-01 to 2008-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Douglas K  Blair → Premier Sand and Stone LLC; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas K  Blair → Texas Sports Sands, Inc.; 2001-08-01 to 2008-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Superior Silica Sands, LLC → Premier Sand and Stone LLC; 2008-06-21 to 2025-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Insight Equity et al → Premier Sand and Stone LLC; 2008-06-21 to 2019-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Insight Equity et al → Superior Silica Sands, LLC; 2008-06-21 to 2019-12-09; source msha-controller-operator-history
- **controller_controls_mine:** HPS Investment Partners et al → Premier Sand and Stone LLC; 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 2025-01-05; source msha-controller-operator-history
- **controller_controls_operator:** PIMCO et al → Superior Silica Sands, LLC; 2019-12-10 to 2025-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Oak Hill Advisors et al → Superior Silica Sands, LLC; 2019-12-10 to 2025-01-05; source msha-controller-operator-history
- **controller_controls_mine:** William  Hayden → Premier Sand and Stone LLC; 2023-05-08 to 2024-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Allan Douglas  Meador → Premier Sand and Stone LLC; 2024-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Premier Sand and Stone LLC → Premier Sand and Stone LLC; 2025-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Hayden → Premier Sand and Stone LLC; 2025-01-06 to 2024-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Allan Douglas  Meador → Premier Sand and Stone LLC; 2025-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Iron Oak Energy Solutions LLC → Premier Sand and Stone LLC; 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 2025-01-05; source msha-controller-operator-history