# Relationship history for MSHA mine 1515734

Current hierarchy: **Shackleford Ray & Joseph R Shuler → 2 Sons Coal Company → No 1**

- 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

- **operator_operates_mine:** S & T Coal Company → No 1; 1986-08-01 to 1987-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Shackleford Nathan Et Al → No 1; 1986-08-01 to 1987-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Shackleford Nathan Et Al → S & T Coal Company; 1986-08-01 to 1987-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Goodin Freddie → No 1; 1986-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brock Energy Coal → No 1; 1987-08-10 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Brock Timothy Et Al → No 1; 1987-08-10 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Brock Timothy Et Al → Brock Energy Coal; 1987-08-10 to 1988-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Scarlett Coal Inc → No 1; 1988-07-01 to 1990-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Goodin Freddie → Scarlett Coal Inc; 1988-07-01 to 1990-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Wildwood Flower Land Company Inc → No 1; 1990-03-01 to 1991-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton Richard → No 1; 1990-03-01 to 1991-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Richard → Wildwood Flower Land Company Inc; 1990-03-01 to 1991-01-09; source msha-controller-operator-history
- **operator_operates_mine:** 2 Sons Coal Company → No 1; 1991-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shackleford Ray & Joseph R Shuler → No 1; 1991-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shackleford Ray & Joseph R Shuler → 2 Sons Coal Company; 1991-01-10 to current/open; source msha-controller-operator-history