# Relationship history for MSHA mine 3102362

Current hierarchy: **Blake A Mansfield → Nansemond Sand and Aggregates LLC dba Bay Sand → Ballance**

- 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:** Nansemond Sand and Aggregates LLC dba Bay Sand → Ballance; 2024-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blake A Mansfield → Ballance; 2024-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blake A Mansfield → Nansemond Sand and Aggregates LLC dba Bay Sand; 2024-06-10 to current/open; source msha-controller-operator-history