# Relationship history for MSHA mine 2601925

Current hierarchy: **Newmont Corporation → Newmont Mining Corporation → McCoy/Cove 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

- **controller_controls_mine:** Newmont Corporation → McCoy/Cove Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tenneco Inc → McCoy/Cove Mine; 1979-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tenneco Minerals Company → McCoy/Cove Mine; 1985-05-01 to 1986-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Tenneco Inc → Tenneco Minerals Company; 1985-05-01 to 1986-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Echo Bay Mines Ltd → McCoy/Cove Mine; 1986-11-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Echo Bay Minerals Company → McCoy/Cove Mine; 1986-12-04 to 2003-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Echo Bay Mines Ltd → Echo Bay Minerals Company; 1986-12-04 to 2003-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Newmont Mining Corporation → McCoy/Cove Mine; 2003-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Newmont Corporation → Newmont Mining Corporation; 2003-02-07 to current/open; source msha-controller-operator-history