# Relationship history for MSHA mine 4801592

Current hierarchy: **Brian  Harmon; Myron  Means → Magna Energy Services, LLC. → CRUSHING 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

- **controller_controls_mine:** Craig  Means et al → CRUSHING PLANT #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K G Construction Company → CRUSHING PLANT #1; 2001-05-01 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Means et al → K G Construction Company; 2001-05-01 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Jerry R  Means et al → K G Construction Company; 2001-05-01 to 2007-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Magna Energy Services, LLC. → CRUSHING PLANT #1; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig  Means et al → CRUSHING PLANT #1; 2007-10-31 to 2010-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Means et al → Magna Energy Services, LLC.; 2007-10-31 to 2010-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Jerry R  Means et al → Magna Energy Services, LLC.; 2007-10-31 to 2010-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Myron  Means et al → CRUSHING PLANT #1; 2010-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Myron  Means et al → Magna Energy Services, LLC.; 2010-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Harmon et al → Magna Energy Services, LLC.; 2010-11-18 to current/open; source msha-controller-operator-history