# Relationship history for MSHA mine 1516786

Current hierarchy: **Clark Edgar N → Serendipity Mining Inc → Serendipity #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:** B & S Mining → Serendipity #1; 1989-11-01 to 1990-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Broughton Ricky & Roy Stamper → Serendipity #1; 1989-11-01 to 1990-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Broughton Ricky & Roy Stamper → B & S Mining; 1989-11-01 to 1990-01-28; source msha-controller-operator-history
- **operator_operates_mine:** Serendipity Mining Inc → Serendipity #1; 1990-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark Edgar N → Serendipity #1; 1990-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark Edgar N → Serendipity Mining Inc; 1990-01-29 to current/open; source msha-controller-operator-history