# Relationship history for MSHA mine 1518035

Current hierarchy: **M Lynn  Parrish → Knott Floyd Land Company → #1 Surface**

- 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:** Knott Floyd Land Company → #1 Surface; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Joyce → #1 Surface; 1998-03-01 to 2004-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Joyce → Knott Floyd Land Company; 1998-03-01 to 2004-07-11; source msha-controller-operator-history
- **controller_controls_mine:** M Lynn  Parrish → #1 Surface; 2004-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M Lynn  Parrish → Knott Floyd Land Company; 2004-07-12 to current/open; source msha-controller-operator-history