# Relationship history for MSHA mine 3503816

Current hierarchy: **Bruce G  Moore; John  Woodmark → Desert Sun Mining and Gems, Inc. → Ponderosa 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Desert Sun Mining and Gems, Inc. → Ponderosa Mine; 2014-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Woodmark et al → Ponderosa Mine; 2014-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Woodmark et al → Desert Sun Mining and Gems, Inc.; 2014-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce G  Moore et al → Desert Sun Mining and Gems, Inc.; 2014-05-30 to current/open; source msha-controller-operator-history