# Relationship history for MSHA mine 4606121

Current hierarchy: **Minnix Dann → Shana Coal Inc → Shana #1**

- 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:** Compliance Processing Corp → Shana #1; 1980-02-01 to 1985-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Dickey Charles → Shana #1; 1980-02-01 to 1985-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Dickey Charles → Compliance Processing Corp; 1980-02-01 to 1985-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Shana Coal Inc → Shana #1; 1985-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Minnix Dann Et Al → Shana #1; 1985-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Minnix Dann Et Al → Shana Coal Inc; 1985-01-09 to current/open; source msha-controller-operator-history