# Relationship history for MSHA mine 2103917

Current hierarchy: **Greg  Griffin → Griffin Construction Pit LLC → Screen Plant**

- 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:** Jack  Griffin et al → Screen Plant; 2009-07-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Griffin Construction Co., LLP → Screen Plant; 2017-08-08 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Griffin et al → Griffin Construction Co., LLP; 2017-08-08 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Griffin et al → Griffin Construction Co., LLP; 2017-08-08 to 2017-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Griffin Construction Pit LLC → Screen Plant; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Griffin → Screen Plant; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Griffin → Griffin Construction Pit LLC; 2018-01-01 to current/open; source msha-controller-operator-history