# Relationship history for MSHA mine 3003304

Current hierarchy: **Aaron  Olson; Thomas  Olson; Christopher R Smith → Jamestown Macadam Inc. → WATERBORO GRAVEL**

- 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:** Roger  Olson et al → WATERBORO GRAVEL; 1950-01-01 to 2019-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Waterboro Gravel Products → WATERBORO GRAVEL; 1999-10-01 to 2020-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Duane  Beaver et al → WATERBORO GRAVEL; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Duane  Beaver et al → Waterboro Gravel Products; 1999-10-01 to 2020-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Dale  Beaver et al → Waterboro Gravel Products; 1999-10-01 to 2020-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Aaron  Olson et al → WATERBORO GRAVEL; 2019-10-27 to 2021-09-11; source msha-controller-operator-history
- **operator_operates_mine:** Jamestown Macadam Inc. → WATERBORO GRAVEL; 2020-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Olson et al → Jamestown Macadam Inc.; 2020-01-21 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Olson et al → Jamestown Macadam Inc.; 2020-01-21 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Wellman et al → Jamestown Macadam Inc.; 2020-01-21 to 2021-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Olson et al → Jamestown Macadam Inc.; 2020-01-21 to 2019-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Christopher R Smith et al → WATERBORO GRAVEL; 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