# Relationship history for MSHA mine 0504339

Current hierarchy: **Gifford A  Dieterle; Jeffrey  Prichard → Leadville Mining & Milling Corp → LEADVILLE CUSTOM MILL**

- 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:** Jeffrey  Prichard et al → LEADVILLE CUSTOM MILL; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leadville Mining & Milling Corp → LEADVILLE CUSTOM MILL; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Prichard et al → Leadville Mining & Milling Corp; 1988-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gifford A  Dieterle et al → Leadville Mining & Milling Corp; 1988-04-01 to current/open; source msha-controller-operator-history