# Relationship history for MSHA mine 2602228

Current hierarchy: **Don W  Tibbals → Gopher Construction, Inc. → Black Mountain**

- 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:** Oglebay Norton Company → Black Mountain; 1950-01-01 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Don W  Tibbals → Black Mountain; 1984-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Highfield Corp → Black Mountain; 1993-05-01 to 2000-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Highfield Glen → Black Mountain; 1993-05-01 to 2000-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Highfield Glen → Highfield Corp; 1993-05-01 to 2000-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Oglebay Norton Industrial Sands Inc → Black Mountain; 2000-10-06 to 2002-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → Oglebay Norton Industrial Sands Inc; 2000-10-06 to 2002-06-29; source msha-controller-operator-history
- **operator_operates_mine:** CanAm Minerals Inc → Black Mountain; 2002-06-30 to 2005-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Barbara  Spurgeon et al → Black Mountain; 2002-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Spurgeon et al → CanAm Minerals Inc; 2002-06-30 to 2005-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Industrial Minerals Inc → Black Mountain; 2005-11-19 to 2006-03-05; source msha-controller-operator-history
- **controller_controls_mine:** William  Miceli → Black Mountain; 2005-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Miceli → Black Mountain Industrial Minerals Inc; 2005-11-19 to 2006-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Industrial Minerals LLC → Black Mountain; 2006-03-06 to 2011-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Spurgeon et al → Black Mountain Industrial Minerals LLC; 2006-03-06 to 2011-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Black Mountain; 2008-02-13 to 2012-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Oglebay Norton Industrial Sands Inc; 2008-02-13 to 2002-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Black Mountain Materials Inc. → Black Mountain; 2011-09-19 to 2017-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Don W  Tibbals → Black Mountain; 2011-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don W  Tibbals → Black Mountain Materials Inc.; 2011-09-19 to 2017-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer Natural Resources USA Incorporated → Black Mountain; 2012-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer Natural Resources USA Incorporated → Oglebay Norton Industrial Sands Inc; 2012-04-02 to 2002-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Gopher Construction, Inc. → Black Mountain; 2017-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don W  Tibbals → Gopher Construction, Inc.; 2017-06-12 to current/open; source msha-controller-operator-history