# Relationship history for MSHA mine 2103773

Current hierarchy: **Gary D.  Hoffman; Jackie C.  Hoffman → Hoffman Gravel & Excavating, Inc. → Stukey Pit**

- 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:** Hoffman Gravel & Excavating, Inc. → Stukey Pit; 2012-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackie C.  Hoffman et al → Stukey Pit; 2012-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackie C.  Hoffman et al → Hoffman Gravel & Excavating, Inc.; 2012-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary D.  Hoffman et al → Hoffman Gravel & Excavating, Inc.; 2012-06-05 to current/open; source msha-controller-operator-history