# Relationship history for MSHA mine 3602203

Current hierarchy: **Christian K  Kauffman → BEAR GAP COAL COMPANY LLC → N & L Slope**

- 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:** N & L Coal Company → N & L Slope; 1950-01-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Novrocki Anthony → N & L Slope; 1950-01-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Novrocki Anthony → N & L Coal Company; 1950-01-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Snyder → N & L Slope; 1976-10-23 to 2005-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Snyder Coal Company → N & L Slope; 1980-08-01 to 2006-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Snyder → Snyder Coal Company; 1980-08-01 to 2005-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Whalen  Wenrich  et al → N & L Slope; 2004-12-09 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Dennis K  Snyder II → N & L Slope; 2005-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis K  Snyder II → Snyder Coal Company; 2005-09-01 to 2006-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Bear Gap Coal → N & L Slope; 2006-07-07 to 2020-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Whalen  Wenrich  et al → Bear Gap Coal; 2006-07-07 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Chris E  Kerstetter  et al → Bear Gap Coal; 2006-07-07 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Eric P  Snyder et al → N & L Slope; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric P  Snyder et al → Bear Gap Coal; 2018-01-01 to 2020-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Christian K  Kauffman et al → Bear Gap Coal; 2018-01-01 to 2020-11-09; source msha-controller-operator-history
- **operator_operates_mine:** BEAR GAP COAL COMPANY LLC → N & L Slope; 2020-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christian K  Kauffman → N & L Slope; 2020-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christian K  Kauffman → BEAR GAP COAL COMPANY LLC; 2020-11-10 to current/open; source msha-controller-operator-history