# Relationship history for MSHA mine 1516354

Current hierarchy: **Saunders Doug → S & S Contracting → #1**

- 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:** Roark Contracting Inc → #1; 1988-04-01 to 1988-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Roark Carolyn → #1; 1988-04-01 to 1988-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Roark Carolyn → Roark Contracting Inc; 1988-04-01 to 1988-10-27; source msha-controller-operator-history
- **operator_operates_mine:** S & S Contracting → #1; 1988-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Saunders Doug → #1; 1988-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saunders Doug → S & S Contracting; 1988-10-28 to current/open; source msha-controller-operator-history