# Relationship history for MSHA mine 3304427

Current hierarchy: **Shari  Morris → DTS Sands LLC → DTS Sands - Beaver Mine**

- 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:** Schrader & Son Inc → DTS Sands - Beaver Mine; 1998-08-01 to 2008-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Schrader → DTS Sands - Beaver Mine; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Schrader → Schrader & Son Inc; 1998-08-01 to 2008-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Southern Ohio Sand → DTS Sands - Beaver Mine; 2008-07-28 to 2024-12-17; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Vaughn et al → DTS Sands - Beaver Mine; 2008-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Vaughn et al → Southern Ohio Sand; 2008-07-28 to 2024-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Francis  Demilta et al → Southern Ohio Sand; 2008-07-28 to 2024-12-17; source msha-controller-operator-history
- **operator_operates_mine:** Konya Sands → DTS Sands - Beaver Mine; 2024-12-18 to 2025-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Anthony J Konya → DTS Sands - Beaver Mine; 2024-12-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony J Konya → Konya Sands; 2024-12-18 to 2025-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Summit Sand & Aggregates LLC → DTS Sands - Beaver Mine; 2025-12-22 to 2026-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Otteman → DTS Sands - Beaver Mine; 2025-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Otteman → Summit Sand & Aggregates LLC; 2025-12-22 to 2026-08-16; source msha-controller-operator-history
- **operator_operates_mine:** DTS Sands LLC → DTS Sands - Beaver Mine; 2026-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shari  Morris → DTS Sands - Beaver Mine; 2026-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shari  Morris → DTS Sands LLC; 2026-08-17 to current/open; source msha-controller-operator-history