# Relationship history for MSHA mine 0404801

Current hierarchy: **Anderson Margaret → Anderson Mining & Exploration Inc → Sidewinder**

- 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:** Tnt Development Inc → Sidewinder; 1986-03-01 to 1986-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Topliss Robert → Sidewinder; 1986-03-01 to 1986-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Topliss Robert → Tnt Development Inc; 1986-03-01 to 1986-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Anderson Mining & Exploration Inc → Sidewinder; 1986-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anderson Margaret → Sidewinder; 1986-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Margaret → Anderson Mining & Exploration Inc; 1986-06-19 to current/open; source msha-controller-operator-history