# Relationship history for MSHA mine 0800395

Current hierarchy: **Valerie  Carnes → Standard Sand & Silica Company → Lake Wales 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:** Lemuel Baylis  Carnes III → Lake Wales Dry Plant; 1950-01-01 to 2024-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Silica Mining Inc → Lake Wales Dry Plant; 1950-01-01 to 1990-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Jacob B  Dibble et al → Lake Wales Dry Plant; 1950-01-01 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Jacob B  Dibble et al → Silica Mining Inc; 1950-01-01 to 1990-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Standard Sand & Silica Company → Lake Wales Dry Plant; 1990-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lemuel Baylis  Carnes III → Standard Sand & Silica Company; 1990-06-13 to 2024-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Valerie  Carnes → Lake Wales Dry Plant; 2024-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Valerie  Carnes → Standard Sand & Silica Company; 2024-02-26 to current/open; source msha-controller-operator-history