# Relationship history for MSHA mine 4503522

Current hierarchy: **Rick  Scarsella; Robert  Scarsella → Scarsella Bros., Inc. → Ross 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

- **controller_controls_mine:** Frank  Scarsella et al → Ross Pit; 2000-05-01 to 2015-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Hansen Willett Excavating Inc → Ross Pit; 2002-11-05 to 2019-07-24; source msha-controller-operator-history
- **controller_controls_mine:** DARREN  HANSEN  ET AL → Ross Pit; 2002-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DARREN  HANSEN  ET AL → Hansen Willett Excavating Inc; 2002-11-05 to 2019-07-24; source msha-controller-operator-history
- **controller_controls_operator:** GUY  WILLETT  ET AL → Hansen Willett Excavating Inc; 2002-11-05 to 2019-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Scarsella et al → Ross Pit; 2015-12-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Scarsella Bros., Inc. → Ross Pit; 2019-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Scarsella et al → Scarsella Bros., Inc.; 2019-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Scarsella et al → Scarsella Bros., Inc.; 2019-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Scarsella et al → Scarsella Bros., Inc.; 2019-07-25 to 2015-12-18; source msha-controller-operator-history