# Relationship history for MSHA mine 3606418

Current hierarchy: **Timothy C  Bosack; Robert B  Bosack → Ash Resources Inc → Indian Head Operation**

- 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:** Pagnotti Enterprises Inc → Indian Head Operation; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Devil'S Hole Inc → Indian Head Operation; 1977-05-01 to 1992-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Jeddo-Highland Coal Company → Indian Head Operation; 1992-08-25 to 2007-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Pagnotti Enterprises Inc → Jeddo-Highland Coal Company; 1992-08-25 to 2007-05-06; source msha-controller-operator-history
- **controller_controls_mine:** Gene B  Gangloff → Indian Head Operation; 2002-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gene B  Gangloff → Devil'S Hole Inc; 2002-05-14 to 1992-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Ash Resources Inc → Indian Head Operation; 2007-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy C  Bosack  et al → Indian Head Operation; 2007-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy C  Bosack  et al → Ash Resources Inc; 2007-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Bosack  et al → Ash Resources Inc; 2007-05-07 to current/open; source msha-controller-operator-history