# Relationship history for MSHA mine 4801417

Current hierarchy: **Jeff  Hildebrand → Hilcorp Energy Company → Tom #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

- **controller_controls_mine:** Robert H Trent → Tom #1; 1982-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Tech Oil Company → Tom #1; 1984-10-01 to 2006-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Robert H Trent → New Tech Oil Company; 1984-10-01 to 2006-02-28; source msha-controller-operator-history
- **operator_operates_mine:** RDG Oil & Gas LLC → Tom #1; 2006-03-01 to 2008-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey H  Wingerter et al → Tom #1; 2006-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey H  Wingerter et al → RDG Oil & Gas LLC; 2006-03-01 to 2008-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Tulloch et al → RDG Oil & Gas LLC; 2006-03-01 to 2008-01-21; source msha-controller-operator-history
- **operator_operates_mine:** Hilcorp Energy Company → Tom #1; 2008-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Hildebrand → Tom #1; 2008-01-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Hildebrand → Hilcorp Energy Company; 2008-01-22 to current/open; source msha-controller-operator-history