# Relationship history for MSHA mine 4700974

Current hierarchy: **Jeff  Peterson; Gordon  Stieber → Morgan Sand & Gravel LLC → Morgan Pit and Mill**

- 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:** Morgan Sand & Gravel Inc → Morgan Pit and Mill; 1950-01-01 to 2014-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Linda  Lemmer → Morgan Pit and Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linda  Lemmer → Morgan Sand & Gravel Inc; 1950-01-01 to 2014-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Morgan Sand & Gravel LLC → Morgan Pit and Mill; 2014-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gordon  Stieber et al → Morgan Pit and Mill; 2014-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Stieber et al → Morgan Sand & Gravel LLC; 2014-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Peterson et al → Morgan Sand & Gravel LLC; 2014-05-05 to current/open; source msha-controller-operator-history