# Relationship history for MSHA mine 0301413

Current hierarchy: **Jones Richard C → Black Diamond Energy Corp → Black Diamond #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

- **controller_controls_mine:** Sims Frank E → Black Diamond #1; 1977-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Frank E Sims Construction Company Inc → Black Diamond #1; 1978-09-01 to 1981-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Sims Frank E → Frank E Sims Construction Company Inc; 1978-09-01 to 1981-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Energy Corp → Black Diamond #1; 1981-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Richard C → Black Diamond #1; 1981-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Richard C → Black Diamond Energy Corp; 1981-03-27 to current/open; source msha-controller-operator-history