# Relationship history for MSHA mine 4003123

Current hierarchy: **W Scott  McGeorge → Jeffrey Sand Co. → Floating Plant Armstrong**

- 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:** W Scott  McGeorge et al → Floating Plant Armstrong; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ingram Industries Inc → Floating Plant Armstrong; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ingram Materials Company-Div/Ingram Industries → Floating Plant Armstrong; 1998-02-01 to 2011-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Ingram Industries Inc → Ingram Materials Company-Div/Ingram Industries; 1998-02-01 to 2011-07-28; source msha-controller-operator-history
- **controller_controls_mine:** W Scott  McGeorge et al → Floating Plant Armstrong; 1998-12-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Bluff Materials LLC → Floating Plant Armstrong; 2011-07-29 to 2012-03-13; source msha-controller-operator-history
- **controller_controls_operator:** W Scott  McGeorge et al → Pine Bluff Materials LLC; 2011-07-29 to 2012-03-13; source msha-controller-operator-history
- **controller_controls_mine:** W Scott  McGeorge et al → Floating Plant Armstrong; 2012-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Bluff Materials Co LLC → Floating Plant Armstrong; 2012-03-14 to 2025-06-22; source msha-controller-operator-history
- **controller_controls_operator:** W Scott  McGeorge et al → Pine Bluff Materials Co LLC; 2012-03-14 to 2025-06-22; source msha-controller-operator-history
- **operator_operates_mine:** Jeffrey Sand Co. → Floating Plant Armstrong; 2025-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W Scott  McGeorge et al → Jeffrey Sand Co.; 2025-06-23 to current/open; source msha-controller-operator-history