# Relationship history for MSHA mine 3304712

Current hierarchy: **Jeffrey R  Sidwell → SIDWELL MATERIALS, INC. → RDS #20**

- 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

- **controller_controls_mine:** Jeffrey R  Sidwell → RDS #20; 1996-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** SIDWELL MATERIALS, INC. → RDS #20; 2014-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey R  Sidwell → SIDWELL MATERIALS, INC.; 2014-07-18 to current/open; source msha-controller-operator-history