# Relationship history for MSHA mine 2003328

Current hierarchy: **Jeffery R.  Blakeslee; Mashell L.  Blakeslee → Gmoser Excavating, Inc. → Coyne's 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:** Gmoser Excavating, Inc. → Coyne's Pit; 2005-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery R.  Blakeslee et al → Coyne's Pit; 2005-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery R.  Blakeslee et al → Gmoser Excavating, Inc.; 2005-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mashell L.  Blakeslee et al → Gmoser Excavating, Inc.; 2005-07-20 to current/open; source msha-controller-operator-history