# Relationship history for MSHA mine 2401558

Current hierarchy: **Hamilton Rex & Kenneth → Great Rocky Mountain Mining Corp → Browns Gulch Placer**

- 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:** 3 T Corp → Browns Gulch Placer; 1980-08-01 to 1982-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Ralph M → Browns Gulch Placer; 1980-08-01 to 1982-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Ralph M → 3 T Corp; 1980-08-01 to 1982-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Montana Minerals → Browns Gulch Placer; 1982-08-04 to 1987-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Coordinated Financial Services-Karl D Blomquist Et → Browns Gulch Placer; 1982-08-04 to 1987-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Coordinated Financial Services-Karl D Blomquist Et → Montana Minerals; 1982-08-04 to 1987-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Brown'S Gulch Mining Inc → Browns Gulch Placer; 1987-06-10 to 1993-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Taylor S Companies Inc → Browns Gulch Placer; 1987-06-10 to 1993-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Taylor S Companies Inc → Brown'S Gulch Mining Inc; 1987-06-10 to 1993-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Great Rocky Mountain Mining Corp → Browns Gulch Placer; 1993-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton Rex & Kenneth Et Al → Browns Gulch Placer; 1993-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Rex & Kenneth Et Al → Great Rocky Mountain Mining Corp; 1993-07-14 to current/open; source msha-controller-operator-history