# Relationship history for MSHA mine 1800563

Current hierarchy: **John  Strittmatter; Mike  Strittmatter → Renard Lakes Holdings, LLC → Smith 301 Pitt**

- 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:** A H Smith → Smith 301 Pitt; 1950-01-01 to 2021-06-27; source msha-controller-operator-history
- **controller_controls_mine:** A H  Smith → Smith 301 Pitt; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A H  Smith → A H Smith; 1950-01-01 to 2021-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Renard Lakes Holdings, LLC → Smith 301 Pitt; 2021-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Strittmatter et al → Smith 301 Pitt; 2021-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Strittmatter et al → Renard Lakes Holdings, LLC; 2021-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Strittmatter et al → Renard Lakes Holdings, LLC; 2021-06-28 to current/open; source msha-controller-operator-history