# Relationship history for MSHA mine 0901223

Current hierarchy: **Darrell T  Morgan → Ogeechee River Sand LLC → Ogeechee**

- 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:** Ogeechee Sand L.L.C → Ogeechee; 2013-02-26 to 2016-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Alan B  Zipperer → Ogeechee; 2013-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan B  Zipperer → Ogeechee Sand L.L.C; 2013-02-26 to 2016-04-10; source msha-controller-operator-history
- **operator_operates_mine:** Ogeechee River Sand LLC → Ogeechee; 2016-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darrell T  Morgan → Ogeechee; 2016-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell T  Morgan → Ogeechee River Sand LLC; 2016-04-11 to current/open; source msha-controller-operator-history