For enclosed storages that are undersized and are required to analyze the effects of surcharge, it would be usedful to have a field when created a pond, where you can seleect if the "pond" is enclosed and if you would like to account for surcharge.

The below link has the current work-around to this:

https://bentleysystems.service-now.com/community?id=kb_article_view&sysparm_article=KB0057899