# Relationship history for MSHA mine 4202579

Current hierarchy: **Rochoetny Inc → Prolific Mining Corporation → Bromide Project**

- 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:** Bromide Mining LLC → Bromide Project; 2011-12-06 to 2017-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Rochoetny Inc et al → Bromide Project; 2011-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rochoetny Inc et al → Bromide Mining LLC; 2011-12-06 to 2017-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Prolific Mining Corporation → Bromide Project; 2017-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rochoetny Inc et al → Bromide Project; 2017-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rochoetny Inc et al → Prolific Mining Corporation; 2017-11-15 to current/open; source msha-controller-operator-history