# Relationship history for MSHA mine 0404788

Current hierarchy: **Tom  Vagivello; Brent Wade  Dingel → Spanish Creek Sand & Gravel LLC → Soper Pit**

- 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

- **operator_operates_mine:** Feather River Materials Inc → Soper Pit; 1986-02-01 to 2012-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Dyrr → Soper Pit; 1986-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Dyrr → Feather River Materials Inc; 1986-02-01 to 2012-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Culver Enterprises → Soper Pit; 2012-08-26 to 2015-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Matthew F  Culver → Soper Pit; 2012-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew F  Culver → Culver Enterprises; 2012-08-26 to 2015-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Spanish Creek Sand & Gravel LLC → Soper Pit; 2015-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  Vagivello et al → Soper Pit; 2015-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Vagivello et al → Spanish Creek Sand & Gravel LLC; 2015-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent Wade  Dingel et al → Spanish Creek Sand & Gravel LLC; 2015-08-19 to current/open; source msha-controller-operator-history