# Relationship history for MSHA mine 1000414

Current hierarchy: **Grant A  Brackebusch → Idaho Strategic Resources Inc → Golden Chest 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Golden Chest Mining Company → Golden Chest Mine; 1981-07-01 to 2014-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Golden Chest Mining Company → Golden Chest Mine; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Golden Chest Mining Company → Golden Chest Mining Company; 1981-07-01 to 2014-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W  Guill → Golden Chest Mine; 1988-04-01 to 2011-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Grant A  Brackebusch et al → Golden Chest Mine; 1995-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Jones → Golden Chest Mine; 2011-01-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** SMALL MINE DEVELOPMENT L.L.C. → Golden Chest Mine; 2014-06-05 to 2015-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Jones → SMALL MINE DEVELOPMENT L.L.C.; 2014-06-05 to 2015-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W  Guill → SMALL MINE DEVELOPMENT L.L.C.; 2014-06-05 to 2011-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Strategic Resources Inc → Golden Chest Mine; 2015-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grant A  Brackebusch et al → Idaho Strategic Resources Inc; 2015-11-09 to current/open; source msha-controller-operator-history