# Relationship history for MSHA mine 2002922

Current hierarchy: **Ronald V  Pustay → R P M Excavating Corp → R.P.M. EXCAVATING CORP.**

- 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:** R P M Excavating Corp → R.P.M. EXCAVATING CORP.; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald V  Pustay → R.P.M. EXCAVATING CORP.; 1994-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald V  Pustay → R P M Excavating Corp; 1994-04-01 to current/open; source msha-controller-operator-history