# Relationship history for MSHA mine 1518234

Current hierarchy: **Watco Holdings Inc → Watco Trans Loading LLC → Grand River Terminal**

- 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:** Kinder Morgan Operating LP C → Grand River Terminal; 2000-01-01 to 2017-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Kinder Morgan Inc et al → Grand River Terminal; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kinder Morgan Inc et al → Kinder Morgan Operating LP C; 2000-01-01 to 2017-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Kinder Morgan Energy Partners et al → Kinder Morgan Operating LP C; 2000-01-01 to 2017-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Watco Holdings Inc → Grand River Terminal; 2017-02-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Watco Trans Loading LLC → Grand River Terminal; 2017-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Watco Holdings Inc → Watco Trans Loading LLC; 2017-03-17 to current/open; source msha-controller-operator-history