# Relationship history for MSHA mine 4003251

Current hierarchy: **Walter E  Tollett → Tollett Stone Inc. → Tollett Stone Company 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Wayne Houston → Tollett Stone Company 2; 2005-02-09 to 2006-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Vernon W  Houston → Tollett Stone Company 2; 2005-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vernon W  Houston → Wayne Houston; 2005-02-09 to 2006-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Philip L Gattis → Tollett Stone Company 2; 2006-06-13 to 2011-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Philip L  Gattis → Tollett Stone Company 2; 2006-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip L  Gattis → Philip L Gattis; 2006-06-13 to 2011-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Jerry Pistole → Tollett Stone Company 2; 2011-04-08 to 2015-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Jerry V.  Pistole → Tollett Stone Company 2; 2011-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry V.  Pistole → Jerry Pistole; 2011-04-08 to 2015-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Walter E  Tollett → Tollett Stone Company 2; 2011-07-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tollett Stone Inc. → Tollett Stone Company 2; 2015-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter E  Tollett → Tollett Stone Inc.; 2015-09-22 to current/open; source msha-controller-operator-history