A hole in the ground you pour money into...
You know the old joke that "A boat is a hole in the ocean that you pour money into"? Well here is a hole in the ground with the same M.O. The old bulkhead rotted away and the basement is quite damp. You'd be damp too if you had a river running through you. Jimmy & Digger on the job to block off the flow and close up the hole.
The house was built before city supplied water so large cisterns were constructed in the basement to gather rain water that came off the roof. No one told the cisterns they were no longer needed so they continued collecting water, which makes for a damp basement (and a scary one). Jimmy & Digger to the rescue! Dug out the old bulkhead and soon will plug up the hole.
Look! Already people lining up to get in!