# Relationship history for MSHA mine 4104473

Current hierarchy: **Michael D  Arnold → Arnold Stone Products → Arnold Stone Products - Tolar Plant**

- 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:** Michael D  Arnold → Arnold Stone Products - Tolar Plant; 2003-03-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arnold Stone Inc → Arnold Stone Products - Tolar Plant; 2004-05-12 to 2016-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Arnold → Arnold Stone Inc; 2004-05-12 to 2016-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Texas Construction Aggregates → Arnold Stone Products - Tolar Plant; 2016-04-15 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Tolar Agg, LLC et al → Arnold Stone Products - Tolar Plant; 2016-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tolar Agg, LLC et al → Texas Construction Aggregates; 2016-04-15 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael D Arnold et al → Texas Construction Aggregates; 2016-04-15 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Ashok E  Kolady → Arnold Stone Products - Tolar Plant; 2018-11-05 to 2020-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael D  Arnold → Arnold Stone Products - Tolar Plant; 2020-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arnold Stone Products → Arnold Stone Products - Tolar Plant; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael D  Arnold → Arnold Stone Products; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashok E  Kolady → Arnold Stone Products; 2022-01-01 to 2020-03-31; source msha-controller-operator-history