# Relationship history for MSHA mine 3503019

Current hierarchy: **C D V Corp Inc-Viking Exploration Inc → Cmae-Viking → Roarick 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:** C D V Corp Inc-Viking Exploration Inc Et Al → Roarick Mine; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cmae-Viking → Roarick Mine; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C D V Corp Inc-Viking Exploration Inc Et Al → Cmae-Viking; 1980-07-01 to current/open; source msha-controller-operator-history