# Relationship history for MSHA mine 4605472

Current hierarchy: **Martha A Ward → Silver Horse Services, LLC → Coalburg Dock**

- 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:** Lawson W  Hamilton Jr → Coalburg Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C S E Inc → Coalburg Dock; 1977-02-01 to 1984-07-08; source msha-controller-operator-history
- **controller_controls_mine:** G B  Frederick → Coalburg Dock; 1977-02-01 to 1984-07-08; source msha-controller-operator-history
- **controller_controls_operator:** G B  Frederick → C S E Inc; 1977-02-01 to 1984-07-08; source msha-controller-operator-history
- **controller_controls_mine:** K C Holding Company → Coalburg Dock; 1982-05-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C S E Inc → Coalburg Dock; 1984-07-09 to 1989-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Biglow Corp → Coalburg Dock; 1984-07-09 to 1989-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Biglow Corp → C S E Inc; 1984-07-09 to 1989-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Kesscoals Inc → Coalburg Dock; 1989-01-23 to 1993-03-16; source msha-controller-operator-history
- **controller_controls_operator:** K C Holding Company → Kesscoals Inc; 1989-01-23 to 1993-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Coalburg Dock; 1989-08-01 to 2005-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Catenary Coal Company → Coalburg Dock; 1993-03-17 to 1995-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Catenary Coal Company; 1993-03-17 to 1995-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Ford Coal Company → Coalburg Dock; 1995-12-28 to 1996-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Lawson W  Hamilton Jr → Ford Coal Company; 1995-12-28 to 1996-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Coalburg Corp → Coalburg Dock; 1996-03-27 to 2022-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Andrew B  Jordon → Coalburg Dock; 1996-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew B  Jordon → Coalburg Corp; 1996-03-27 to 2022-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Magnum Coal Company → Coalburg Dock; 2005-12-31 to 2008-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Magnum Coal Company → Catenary Coal Company; 2005-12-31 to 1995-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Coalburg Dock; 2008-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Catenary Coal Company; 2008-07-23 to 1995-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Silver Horse Services, LLC → Coalburg Dock; 2022-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Martha A Ward → Coalburg Dock; 2022-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martha A Ward → Silver Horse Services, LLC; 2022-05-11 to current/open; source msha-controller-operator-history