User BlackstoneVal 
BlackstoneVal 
posted 19 waymarks in 19 different categories within one country and 2 regions, of these were 12 posted-first-in-region.
In the following list are the categories listed where BlackstoneVal is or was an officer. The star denotes an active officer role, if it is golden then BlackstoneVal is also the current leader of the category.
| active | Category | # Approvals | # Missings |
|---|---|---|---|
 Abbeys, Convents and Monasteries | 1 | - | |
 Disc Golf Courses | 1 | 20 | |
 Foucault Pendulums | 1 | 4 | |
 Waterway Locks, Planes and Lifts | 0 | 75 |