# Relationship history for MSHA mine 0500296

Current hierarchy: **Allegiance Coal LTD → New Elk Coal Company LLC → New Elk Mine**

- 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:** C F & I Steel Corp → New Elk Mine; 1950-01-01 to 1984-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Crane Company → New Elk Mine; 1950-01-01 to 1986-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Crane Company → C F & I Steel Corp; 1950-01-01 to 1984-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Kn Energy Inc → New Elk Mine; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Fuel Company → New Elk Mine; 1984-01-05 to 2006-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Kn Energy Inc → Wyoming Fuel Company; 1984-01-05 to 2006-06-07; source msha-controller-operator-history
- **controller_controls_mine:** John  McCulloch et al → New Elk Mine; 2006-05-05 to 2009-06-09; source msha-controller-operator-history
- **operator_operates_mine:** New Elk Coal Company LLC → New Elk Mine; 2006-06-08 to 2010-07-11; source msha-controller-operator-history
- **controller_controls_operator:** John  McCulloch et al → New Elk Coal Company LLC; 2006-06-08 to 2009-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Coverdale et al → New Elk Coal Company LLC; 2006-06-08 to 2009-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Cline Mining Corporation et al → New Elk Mine; 2009-06-10 to 2020-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Cline Mining Corporation et al → New Elk Coal Company LLC; 2009-06-10 to 2010-07-11; source msha-controller-operator-history
- **operator_operates_mine:** T K Mining Services, LLC → New Elk Mine; 2010-07-12 to 2012-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Keith  Buhrdorf et al → New Elk Mine; 2010-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Buhrdorf et al → T K Mining Services, LLC; 2010-07-12 to 2012-02-15; source msha-controller-operator-history
- **controller_controls_operator:** David A  Schaaf  et al → T K Mining Services, LLC; 2010-07-12 to 2012-02-15; source msha-controller-operator-history
- **operator_operates_mine:** New Elk Coal Company LLC → New Elk Mine; 2012-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Coverdale et al → New Elk Coal Company LLC; 2012-02-16 to 2009-06-09; source msha-controller-operator-history
- **controller_controls_operator:** John  McCulloch et al → New Elk Coal Company LLC; 2012-02-16 to 2009-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Cline Mining Corporation et al → New Elk Coal Company LLC; 2012-02-16 to 2020-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Allegiance Coal LTD → New Elk Mine; 2020-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allegiance Coal LTD → New Elk Coal Company LLC; 2020-10-26 to 2010-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Allegiance Coal LTD → New Elk Coal Company LLC; 2020-10-26 to current/open; source msha-controller-operator-history