# Relationship history for MSHA mine 3002974

Current hierarchy: **Aaron  Olson; Thomas  Olson; Christopher R Smith → Jamestown Macadam Inc → Hy Banks Gravel Prod**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Roger  Olson et al → Hy Banks Gravel Prod; 1950-01-01 to 2019-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Revie & Jud Enterprises Inc → Hy Banks Gravel Prod; 1990-07-01 to 2008-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Jud A Johnson → Hy Banks Gravel Prod; 1990-07-01 to 2002-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Jud A Johnson → Revie & Jud Enterprises Inc; 1990-07-01 to 2002-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Olson Roger → Hy Banks Gravel Prod; 2002-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Olson Roger → Revie & Jud Enterprises Inc; 2002-05-01 to 2008-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Jamestown Macadam Inc → Hy Banks Gravel Prod; 2008-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Olson et al → Jamestown Macadam Inc; 2008-01-21 to 2019-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Aaron  Olson et al → Hy Banks Gravel Prod; 2019-10-27 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Olson et al → Jamestown Macadam Inc; 2019-10-27 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Olson et al → Jamestown Macadam Inc; 2019-10-27 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Wellman et al → Jamestown Macadam Inc; 2019-10-27 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Christopher R Smith et al → Hy Banks Gravel Prod; 2021-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher R Smith et al → Jamestown Macadam Inc; 2021-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Olson et al → Jamestown Macadam Inc; 2021-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Olson et al → Jamestown Macadam Inc; 2021-09-12 to current/open; source msha-controller-operator-history