# Relationship history for MSHA mine 3503635

Current hierarchy: **Craig S  Scoggin; Krista K  Scoggin → Valley Materials Inc. → Portable  # 2**

- 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:** Craig S  Scoggin et al → Portable  # 2; 2001-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley Materials Inc. → Portable  # 2; 2006-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig S  Scoggin et al → Valley Materials Inc.; 2006-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Krista K  Scoggin et al → Valley Materials Inc.; 2006-04-13 to current/open; source msha-controller-operator-history