# Relationship history for MSHA mine 0503652

Current hierarchy: **Larson Arden L--C E Carlson → Saratoga Mines Inc → Frontenac 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Larson Arden L → Frontenac Mine; 1980-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silver Leaf Resources Inc → Frontenac Mine; 1981-02-01 to 1982-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Larson Arden L → Silver Leaf Resources Inc; 1981-02-01 to 1982-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Larson Arden L--C E Carlson Et Al → Frontenac Mine; 1981-08-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Saratoga Mines Inc → Frontenac Mine; 1982-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larson Arden L--C E Carlson Et Al → Saratoga Mines Inc; 1982-12-21 to current/open; source msha-controller-operator-history