# Relationship history for MSHA mine 1301999

Current hierarchy: **Riverstone Group → LeClaire Investments Inc → Leclaire Portable Crusher #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Riverstone Group → Leclaire Portable Crusher #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wecc Corp → Leclaire Portable Crusher #1; 1983-04-01 to 1987-04-14; source msha-controller-operator-history
- **controller_controls_mine:** B W  Carpenter  et al → Leclaire Portable Crusher #1; 1983-04-01 to 1987-05-03; source msha-controller-operator-history
- **controller_controls_operator:** B W  Carpenter  et al → Wecc Corp; 1983-04-01 to 1987-04-14; source msha-controller-operator-history
- **operator_operates_mine:** LeClaire Investments Inc → Leclaire Portable Crusher #1; 1987-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group → LeClaire Investments Inc; 1987-04-15 to current/open; source msha-controller-operator-history