# Relationship history for MSHA mine 4103118

Current hierarchy: **Brannon William → West Texas Metals Inc → Blue Mountain 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:** West Hueco Corp → Blue Mountain Mine; 1982-06-01 to 1987-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Miller Ian & Stephen Mc Taggart → Blue Mountain Mine; 1982-06-01 to 1987-01-11; source msha-controller-operator-history
- **controller_controls_operator:** Miller Ian & Stephen Mc Taggart → West Hueco Corp; 1982-06-01 to 1987-01-11; source msha-controller-operator-history
- **operator_operates_mine:** West Texas Metals Inc → Blue Mountain Mine; 1987-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brannon William → Blue Mountain Mine; 1987-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brannon William → West Texas Metals Inc; 1987-01-12 to current/open; source msha-controller-operator-history