# Relationship history for MSHA mine 0404470

Current hierarchy: **James  Richert → Coronet Concrete Products Inc → Fargo Canyon Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Allred & Kyser Contruction Company → Fargo Canyon Mine; 1980-10-01 to 1983-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Kyser Thomas E → Fargo Canyon Mine; 1980-10-01 to 1983-04-24; source msha-controller-operator-history
- **controller_controls_operator:** Kyser Thomas E → Allred & Kyser Contruction Company; 1980-10-01 to 1983-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Palm Desert Rock & Sand → Fargo Canyon Mine; 1983-04-25 to 1986-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Fincher Don & Erik Watts → Fargo Canyon Mine; 1983-04-25 to 1986-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Fincher Don & Erik Watts → Palm Desert Rock & Sand; 1983-04-25 to 1986-10-27; source msha-controller-operator-history
- **operator_operates_mine:** Palm Desert Rock & Sand Inc → Fargo Canyon Mine; 1986-10-28 to 2006-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Norcross D C → Fargo Canyon Mine; 1986-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norcross D C → Palm Desert Rock & Sand Inc; 1986-10-28 to 2006-07-20; source msha-controller-operator-history
- **operator_operates_mine:** Coronet Concrete Products Inc → Fargo Canyon Mine; 2006-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Richert → Fargo Canyon Mine; 2006-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Richert → Coronet Concrete Products Inc; 2006-07-21 to current/open; source msha-controller-operator-history