# Relationship history for MSHA mine 3607465

Current hierarchy: **A F Budge Mining Ltd → Glacial Minerals Inc → Glacial Minerals**

- 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

- **controller_controls_mine:** A F Budge Mining Ltd → Glacial Minerals; 1979-03-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G K & G Inc → Glacial Minerals; 1983-05-01 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Gerome Henry → Glacial Minerals; 1983-05-01 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Gerome Henry → G K & G Inc; 1983-05-01 to 1986-09-30; source msha-controller-operator-history
- **operator_operates_mine:** G K & G Inc → Glacial Minerals; 1986-10-01 to 1989-01-05; source msha-controller-operator-history
- **controller_controls_mine:** O'Hara David C → Glacial Minerals; 1986-10-01 to 1989-01-05; source msha-controller-operator-history
- **controller_controls_operator:** O'Hara David C → G K & G Inc; 1986-10-01 to 1989-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Glacial Minerals Inc → Glacial Minerals; 1989-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Glacial Minerals Inc; 1989-01-06 to current/open; source msha-controller-operator-history