# Relationship history for MSHA mine 4104183

Current hierarchy: **Russ  Williams → TriCounty Materials and Services LP → TriCounty Materials and Services LP**

- 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:** Mountain Creek Sand & Gravel Llc → TriCounty Materials and Services LP; 2000-07-01 to 2003-08-10; source msha-controller-operator-history
- **controller_controls_mine:** John F Gann → TriCounty Materials and Services LP; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John F Gann → Mountain Creek Sand & Gravel Llc; 2000-07-01 to 2003-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Sivells Bend Materials Inc. → TriCounty Materials and Services LP; 2003-08-11 to 2015-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Joe B  Spencer → TriCounty Materials and Services LP; 2003-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe B  Spencer → Sivells Bend Materials Inc.; 2003-08-11 to 2015-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Russ  Williams et al → TriCounty Materials and Services LP; 2006-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TriCounty Materials and Services LP → TriCounty Materials and Services LP; 2015-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russ  Williams et al → TriCounty Materials and Services LP; 2015-09-17 to current/open; source msha-controller-operator-history