# Relationship history for MSHA mine 2104012

Current hierarchy: **Rick  Schulke; Mark  Hawkinson → Coon's Aggregate Supply Co, LLC → CRUSHER 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:** Rick  Schulke et al → CRUSHER 1; 2012-08-13 to 2021-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Hawkinson et al → CRUSHER 1; 2021-07-12 to 2024-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Coon's Aggregate Supply Co, LLC → CRUSHER 1; 2021-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Schulke et al → Coon's Aggregate Supply Co, LLC; 2021-08-02 to 2021-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Hawkinson et al → Coon's Aggregate Supply Co, LLC; 2021-08-02 to 2021-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Hawkinson et al → Coon's Aggregate Supply Co, LLC; 2021-08-02 to 2024-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Schulke et al → Coon's Aggregate Supply Co, LLC; 2021-08-02 to 2024-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Schulke et al → CRUSHER 1; 2024-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Schulke et al → Coon's Aggregate Supply Co, LLC; 2024-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Hawkinson et al → Coon's Aggregate Supply Co, LLC; 2024-05-06 to current/open; source msha-controller-operator-history