# Relationship history for MSHA mine 2002757

Current hierarchy: **Scott R  Holloway → Screeners Sand & Gravel, Inc. → HO-2**

- 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

- **controller_controls_mine:** Rick  Massuch → HO-2; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waterland Trucking Service Inc → HO-2; 1986-06-01 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Massuch → Waterland Trucking Service Inc; 1986-06-01 to 2003-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Scott R  Holloway → HO-2; 2001-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Holloway Companies, Inc. → HO-2; 2004-01-01 to 2006-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Scott R  Holloway → HO-2; 2004-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott R  Holloway → Holloway Companies, Inc.; 2004-01-01 to 2006-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Screeners Sand & Gravel, Inc. → HO-2; 2006-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott R  Holloway → Screeners Sand & Gravel, Inc.; 2006-07-14 to current/open; source msha-controller-operator-history