# Relationship history for MSHA mine 2103201

Current hierarchy: **Dedra  Reiner; Frank  Little; Craig  Reiner → Skyline Companies, Inc → WASH PLANT #1**

- 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:** Skyline Companies, Inc → WASH PLANT #1; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig S  Reiner → WASH PLANT #1; 1999-06-01 to 2025-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Craig S  Reiner → Skyline Companies, Inc; 1999-06-01 to 2025-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Little et al → WASH PLANT #1; 2026-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Little et al → Skyline Companies, Inc; 2026-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Reiner et al → Skyline Companies, Inc; 2026-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dedra  Reiner et al → Skyline Companies, Inc; 2026-01-01 to current/open; source msha-controller-operator-history