# Relationship history for MSHA mine 3605270

Current hierarchy: **Valeri Carl C → Better Mining Inc → Ohler Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Better Mining Corp → Ohler Strip; 1974-01-01 to 1977-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Morchesky James → Ohler Strip; 1974-01-01 to 1977-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Morchesky James → Better Mining Corp; 1974-01-01 to 1977-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Blum Bentley J → Ohler Strip; 1977-10-17 to 1979-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Better Mining Inc → Ohler Strip; 1977-12-07 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Blum Bentley J → Better Mining Inc; 1977-12-07 to 1979-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Better Mining Inc → Ohler Strip; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Valeri Carl C → Ohler Strip; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Valeri Carl C → Better Mining Inc; 1979-02-01 to current/open; source msha-controller-operator-history