# Relationship history for MSHA mine 2003488

Current hierarchy: **Kyle  Fortier; Steven  Rigoni; Christopher  Rigoni → Bacco Construction Company → Powerscreen Model 1800**

- 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:** Doug  Rigoni  et al → Powerscreen Model 1800; 2001-05-01 to 2022-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Bacco Construction Company → Powerscreen Model 1800; 2014-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Rigoni  et al → Bacco Construction Company; 2014-04-25 to 2022-05-31; source msha-controller-operator-history
- **controller_controls_operator:** John  Fortier  et al → Bacco Construction Company; 2014-04-25 to 2022-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Kyle  Fortier et al → Powerscreen Model 1800; 2022-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyle  Fortier et al → Bacco Construction Company; 2022-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Rigoni et al → Bacco Construction Company; 2022-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Rigoni et al → Bacco Construction Company; 2022-06-01 to current/open; source msha-controller-operator-history