# Relationship history for MSHA mine 2103013

Current hierarchy: **Dela S  Stark; Shirley  Stark → D & D Stark, Inc. → Portable Stark #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:** D & D Stark, Inc. → Portable Stark #1; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dela S  Stark et al → Portable Stark #1; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dela S  Stark et al → D & D Stark, Inc.; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shirley  Stark et al → D & D Stark, Inc.; 1990-07-01 to current/open; source msha-controller-operator-history