# Relationship history for MSHA mine 0505159

Current hierarchy: **Jamie  Patterson; Dave  Patterson → Colorado Sand Company → Keenesburg #2**

- 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:** Colorado Sand Company → Keenesburg #2; 2022-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jamie  Patterson et al → Keenesburg #2; 2022-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jamie  Patterson et al → Colorado Sand Company; 2022-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Patterson et al → Colorado Sand Company; 2022-10-24 to current/open; source msha-controller-operator-history