# Relationship history for MSHA mine 1301109

Current hierarchy: **Manatts Enterprises; Cedar Valley Corp → BMC Aggregates LC → Portable Rock Drill #317**

- 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:** Paul Niemann Construction Company, Inc. → Portable Rock Drill #317; 1950-01-01 to 2023-03-06; source msha-controller-operator-history
- **controller_controls_mine:** James L  Niemann → Portable Rock Drill #317; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Niemann → Paul Niemann Construction Company, Inc.; 1950-01-01 to 2023-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Manatts Enterprises et al → Portable Rock Drill #317; 2006-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BMC Aggregates LC → Portable Rock Drill #317; 2023-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Manatts Enterprises et al → BMC Aggregates LC; 2023-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cedar Valley Corp  et al → BMC Aggregates LC; 2023-03-07 to current/open; source msha-controller-operator-history