# Relationship history for MSHA mine 4105178

Current hierarchy: **Ryan J  Kinkade → K2 Contractors Inc → K2 Materials**

- 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:** Little John's Welding Service → K2 Materials; 2016-03-17 to 2026-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Johnie S  McComb III → K2 Materials; 2016-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnie S  McComb III → Little John's Welding Service; 2016-03-17 to 2026-04-09; source msha-controller-operator-history
- **operator_operates_mine:** K2 Contractors Inc → K2 Materials; 2026-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan J  Kinkade → K2 Materials; 2026-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan J  Kinkade → K2 Contractors Inc; 2026-04-10 to current/open; source msha-controller-operator-history