# Relationship history for MSHA mine 1100149

Current hierarchy: **Stephanie  Prosser; Stacy  Walsh → Nokomis Quarry Company → Nokomis Quarry Co**

- 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:** Nokomis Quarry Company → Nokomis Quarry Co; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A  Dougherty et al → Nokomis Quarry Co; 1950-01-01 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** James A  Dougherty et al → Nokomis Quarry Company; 1950-01-01 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** James H  Prosser et al → Nokomis Quarry Company; 1950-01-01 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Stacy  Walsh et al → Nokomis Quarry Co; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy  Walsh et al → Nokomis Quarry Company; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephanie  Prosser et al → Nokomis Quarry Company; 2013-07-01 to current/open; source msha-controller-operator-history