# Relationship history for MSHA mine 3503442

Current hierarchy: **Keeton Arland T → Keeton-King Construction Inc → KEETON-KING CONSTRUCTION INC**

- 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:** Keeton-King Construction Inc → KEETON-KING CONSTRUCTION INC; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keeton Arland T → KEETON-KING CONSTRUCTION INC; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keeton Arland T → Keeton-King Construction Inc; 1996-03-01 to current/open; source msha-controller-operator-history