# Relationship history for MSHA mine 2602865

Current hierarchy: **Lance K  Semenko; Mike P  Dianda; Chris A  Dianda → Q&D Construction → Rental Portable Crusher**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Christopher  Dianda et al → Rental Portable Crusher; 2017-03-16 to 2021-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Q&D Construction → Rental Portable Crusher; 2020-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Dianda et al → Q&D Construction; 2020-11-06 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Dianda et al → Q&D Construction; 2020-11-06 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Lance K  Semenko et al → Rental Portable Crusher; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lance K  Semenko et al → Q&D Construction; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris A  Dianda et al → Q&D Construction; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike P  Dianda et al → Q&D Construction; 2022-01-01 to current/open; source msha-controller-operator-history