# Relationship history for MSHA mine 1510137

Current hierarchy: **Scott M  Smith; Clyde V  Bennett → United States Energy LLC → United States Energy**

- 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:** Smith Coal Processing Company → United States Energy; 1976-12-01 to 1986-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Alan S  Smith → United States Energy; 1976-12-01 to 1986-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Alan S  Smith → Smith Coal Processing Company; 1976-12-01 to 1986-03-25; source msha-controller-operator-history
- **operator_operates_mine:** S & E Coal Processing Inc → United States Energy; 1986-03-26 to 1999-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Stewart H  Ashton Jr → United States Energy; 1986-03-26 to 1999-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Stewart H  Ashton Jr → S & E Coal Processing Inc; 1986-03-26 to 1999-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Park Valley Land Development → United States Energy; 1999-03-03 to 2004-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Wagers → United States Energy; 1999-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Wagers → Park Valley Land Development; 1999-03-03 to 2004-08-29; source msha-controller-operator-history
- **operator_operates_mine:** C & T COAL SALES, LLC → United States Energy; 2004-08-30 to 2007-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Webb et al → United States Energy; 2004-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Webb et al → C & T COAL SALES, LLC; 2004-08-30 to 2007-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Prestige Processing Inc → United States Energy; 2007-02-22 to 2010-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Aaron  Jackson → United States Energy; 2007-02-22 to 2007-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Jackson → Prestige Processing Inc; 2007-02-22 to 2007-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Cecil  Lewis → United States Energy; 2007-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cecil  Lewis → Prestige Processing Inc; 2007-07-17 to 2010-10-31; source msha-controller-operator-history
- **operator_operates_mine:** United States Energy LLC → United States Energy; 2010-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clyde V  Bennett et al → United States Energy; 2010-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clyde V  Bennett et al → United States Energy LLC; 2010-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott M  Smith et al → United States Energy LLC; 2010-11-01 to current/open; source msha-controller-operator-history