# Relationship history for MSHA mine 4407154

Current hierarchy: **David  Stevenson → DaCoal Mining, Inc. → No. 5**

- 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:** TECO Energy Inc → No. 5; 1988-04-26 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** David  Stevenson → No. 5; 2000-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clintwood Elkhorn Mining Co → No. 5; 2005-10-25 to 2006-07-30; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Clintwood Elkhorn Mining Co; 2005-10-25 to 2006-07-30; source msha-controller-operator-history
- **operator_operates_mine:** DaCoal Mining, Inc. → No. 5; 2006-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Stevenson → DaCoal Mining, Inc.; 2006-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → No. 5; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Clintwood Elkhorn Mining Co; 2015-09-21 to 2006-07-30; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → No. 5; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Clintwood Elkhorn Mining Co; 2019-06-16 to 2006-07-30; source msha-controller-operator-history