# Relationship history for MSHA mine 1519444

Current hierarchy: **W Scott  McGeorge → Pine Bluff Materials → Dredge V**

- 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:** Fred (Pete)  Irving → Dredge V; 1999-03-12 to 2005-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Earl  Brinker et al → Dredge V; 2005-12-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** IMI South, LLC → Dredge V; 2009-11-13 to 2010-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Earl  Brinker et al → IMI South, LLC; 2009-11-13 to 2010-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Fred (Pete)  Irving → IMI South, LLC; 2009-11-13 to 2005-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Hunter Sand & Gravel, LLC. → Dredge V; 2010-10-11 to 2016-11-02; source msha-controller-operator-history
- **controller_controls_mine:** HMT Holdings, Inc. → Dredge V; 2010-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** HMT Holdings, Inc. → Hunter Sand & Gravel, LLC.; 2010-10-11 to 2016-11-02; source msha-controller-operator-history
- **controller_controls_mine:** W Scott  McGeorge et al → Dredge V; 2012-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Bluff Materials → Dredge V; 2016-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W Scott  McGeorge et al → Pine Bluff Materials; 2016-11-03 to current/open; source msha-controller-operator-history