# Relationship history for MSHA mine 3503724

Current hierarchy: **Rogers Excavating Inc; CFA 3 Inc; Peter F Adams → Farmington Mobile Crushing LLC → Parkin Quarry**

- 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:** Northwest Boulder & Rock LLC → Parkin Quarry; 2009-08-10 to 2013-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Janice  Harman et al → Parkin Quarry; 2009-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janice  Harman et al → Northwest Boulder & Rock LLC; 2009-08-10 to 2013-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Casey  Harman et al → Northwest Boulder & Rock LLC; 2009-08-10 to 2013-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Farmington Mobile Crushing LLC → Parkin Quarry; 2013-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Excavating Inc et al → Parkin Quarry; 2013-10-30 to 2023-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Excavating Inc et al → Farmington Mobile Crushing LLC; 2013-10-30 to 2023-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Farmington Landfill LLC et al → Farmington Mobile Crushing LLC; 2013-10-30 to 2023-03-12; source msha-controller-operator-history
- **controller_controls_mine:** CFA 3 Inc et al → Parkin Quarry; 2023-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CFA 3 Inc et al → Farmington Mobile Crushing LLC; 2023-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter F Adams et al → Farmington Mobile Crushing LLC; 2023-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Excavating Inc et al → Farmington Mobile Crushing LLC; 2023-03-13 to current/open; source msha-controller-operator-history