# Relationship history for MSHA mine 1700961

Current hierarchy: **Seth A  Snowman → Snowman's Construction Inc → Webb Ridge Road**

- 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:** Snowman's Construction Inc → Webb Ridge Road; 2015-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Seth A  Snowman → Webb Ridge Road; 2015-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Seth A  Snowman → Snowman's Construction Inc; 2015-06-16 to current/open; source msha-controller-operator-history