# Relationship history for MSHA mine 4703482

Current hierarchy: **David Michael  Small; Kathleen  Sugden-Small → Door County Custom Stone, Inc. → Stone Road Properties**

- 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:** Door County Custom Stone Inc → Stone Road Properties; 2006-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kathleen  Sugden-Small  et al → Stone Road Properties; 2006-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kathleen  Sugden-Small  et al → Door County Custom Stone Inc; 2006-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Michael  Small  et al → Door County Custom Stone Inc; 2006-11-13 to current/open; source msha-controller-operator-history