# Relationship history for MSHA mine 0405107

Current hierarchy: **Floyd L  Ogle → North Continent Land and Timber → New Era Mining Corp**

- 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

- **controller_controls_mine:** Logan Ronald R Et Al → New Era Mining Corp; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Era Mines → New Era Mining Corp; 1990-09-01 to 2007-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Logan Ronald R Et Al → New Era Mines; 1990-09-01 to 2007-08-14; source msha-controller-operator-history
- **operator_operates_mine:** North Continent Land and Timber → New Era Mining Corp; 2007-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Floyd L  Ogle → New Era Mining Corp; 2007-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd L  Ogle → North Continent Land and Timber; 2007-08-15 to current/open; source msha-controller-operator-history