# Relationship history for MSHA mine 4703074

Current hierarchy: **Janesville Sand & Gravel Company → LYCON Inc → Waupaca Sand & Stone, LLC.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Janesville Sand & Gravel Company → Waupaca Sand & Stone, LLC.; 1983-03-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waupaca Sand & Stone → Waupaca Sand & Stone, LLC.; 1996-06-01 to 2021-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Roloff → Waupaca Sand & Stone, LLC.; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Roloff → Waupaca Sand & Stone; 1996-06-01 to 2021-01-26; source msha-controller-operator-history
- **operator_operates_mine:** LYCON Inc → Waupaca Sand & Stone, LLC.; 2021-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janesville Sand & Gravel Company → LYCON Inc; 2021-01-27 to current/open; source msha-controller-operator-history