# Relationship history for MSHA mine 4608921

Current hierarchy: **John T  Quintrell → Civil, LLC → CV#4 Surface 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Massey Energy Company → CV#4 Surface Mine; 1991-12-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → CV#4 Surface Mine; 2001-03-01 to 2008-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Independence Coal Company → CV#4 Surface Mine; 2001-09-01 to 2006-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Independence Coal Company; 2001-09-01 to 2006-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Frasure Creek Mining LLC → CV#4 Surface Mine; 2006-10-10 to 2014-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Frasure Creek Mining LLC; 2006-10-10 to 2008-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth W  Woodring → CV#4 Surface Mine; 2008-11-01 to 2010-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth W  Woodring → Frasure Creek Mining LLC; 2008-11-01 to 2010-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Essar Minerals Canada Limited → CV#4 Surface Mine; 2010-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Essar Minerals Canada Limited → Frasure Creek Mining LLC; 2010-04-07 to 2014-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → CV#4 Surface Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Independence Coal Company; 2011-06-01 to 2006-10-09; source msha-controller-operator-history
- **operator_operates_mine:** West Fork Coal, LLC → CV#4 Surface Mine; 2014-03-14 to 2016-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Tommy  Grant → CV#4 Surface Mine; 2014-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tommy  Grant → West Fork Coal, LLC; 2014-03-14 to 2016-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Cline & Son Stone & Gravel, Inc. → CV#4 Surface Mine; 2016-03-22 to 2021-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Cline → CV#4 Surface Mine; 2016-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Cline → Cline & Son Stone & Gravel, Inc.; 2016-03-22 to 2021-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → CV#4 Surface Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Independence Coal Company; 2016-07-26 to 2006-10-09; source msha-controller-operator-history
- **controller_controls_mine:** John T  Quintrell → CV#4 Surface Mine; 2019-09-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Civil, LLC → CV#4 Surface Mine; 2021-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John T  Quintrell → Civil, LLC; 2021-11-30 to current/open; source msha-controller-operator-history