When water started seeping into an underground parking garage below a four-story condominium building in St. Paul, Minn., the property managers knew that the only solution was to re-waterproof the exterior block of the garage.

Set on a hill overlooking the Mississippi River valley, the residential building had a street-side retaining wall that needed to be removed in order to access the block foundation.

“There were three considerations when replacing the retaining wall,” said Stanley Genadek, owner of Genadek Excavating and Landscaping in Mendota Heights, Minn. Genadek is the creator and host of dozens of how-to videos of interest to landscapers on his popular “Dirt Monkey University” YouTube channel.

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