# Relationship history for MSHA mine 4104442

Current hierarchy: **Scott S Meek; Joshua A Smith → Mansfield Sand & Select, LLC → Portable #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:** Mansfield Sand & Select → Portable #1; 2003-08-29 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_mine:** James C  Meek et al → Portable #1; 2003-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James C  Meek et al → Mansfield Sand & Select; 2003-08-29 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Scott S  Meek et al → Mansfield Sand & Select; 2003-08-29 to 2013-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Mansfield Sand & Select, LLC → Portable #1; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joshua A Smith et al → Portable #1; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua A Smith et al → Mansfield Sand & Select, LLC; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott S Meek et al → Mansfield Sand & Select, LLC; 2013-07-01 to current/open; source msha-controller-operator-history