# Relationship history for MSHA mine 1001755

Current hierarchy: **State Street Corporation → United States Antimony Corp → Valley Creek**

- 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:** John C  Lawrence et al → Valley Creek; 1950-01-01 to 2003-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Valley Creek Joint Venture → Valley Creek; 1986-07-01 to 1987-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Marschall Vern--Ken Lonn Et Al → Valley Creek; 1986-07-01 to 1987-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Marschall Vern--Ken Lonn Et Al → Valley Creek Joint Venture; 1986-07-01 to 1987-02-04; source msha-controller-operator-history
- **operator_operates_mine:** United States Antimony Corp → Valley Creek; 1987-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John C  Lawrence et al → United States Antimony Corp; 1987-02-05 to 2003-06-10; source msha-controller-operator-history
- **controller_controls_mine:** State Street Corporation et al → Valley Creek; 2026-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Street Corporation et al → United States Antimony Corp; 2026-02-05 to current/open; source msha-controller-operator-history