# Relationship history for MSHA mine 0401690

Current hierarchy: **Penny J  Holliday → Holliday Rock Company Inc → Littlerock 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Penny J  Holliday et al → Littlerock Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Antelope Valley Aggregate Inc → Littlerock Plant; 1950-01-01 to 2008-10-02; source msha-controller-operator-history
- **controller_controls_mine:** A C  Warnack → Littlerock Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A C  Warnack → Antelope Valley Aggregate Inc; 1950-01-01 to 2008-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Holliday Rock Company Inc → Littlerock Plant; 2008-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Penny J  Holliday et al → Holliday Rock Company Inc; 2008-10-03 to current/open; source msha-controller-operator-history