# Relationship history for MSHA mine 4201415

Current hierarchy: **Nelson Harold → Harold Nelson → Geneva Incline**

- 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:** S & S Mining Company Inc → Geneva Incline; 1950-01-01 to 1978-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Stocks Clayton Et Al → Geneva Incline; 1950-01-01 to 1982-12-07; source msha-controller-operator-history
- **controller_controls_operator:** Stocks Clayton Et Al → S & S Mining Company Inc; 1950-01-01 to 1978-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Harold Nelson → Geneva Incline; 1978-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Harold → Geneva Incline; 1978-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Harold → Harold Nelson; 1978-11-01 to current/open; source msha-controller-operator-history