# Relationship history for MSHA mine 3003691

Current hierarchy: **Morgan J.  Williams → Morgan Williams Excavation Trucking & Comp Sep Ser → Towles Pit**

- 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:** Morgan Williams Excavation Trucking & Comp Sep Ser → Towles Pit; 2009-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Morgan J.  Williams → Towles Pit; 2009-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morgan J.  Williams → Morgan Williams Excavation Trucking & Comp Sep Ser; 2009-07-14 to current/open; source msha-controller-operator-history