Inground post

Howdy everyone, I have an old brick hillside house with a concrete retaining wall/trench across the back. The bedrock is very shallow on the lot, so the foundation and retaining wall are built right on top of the rock. Very sturdy, but water flows on top of the bedrock, right under the retaining wall and trench, right into my crawlspace. French drains are ineffective. I broke up some of the concrete trench and lo-and-behold, I found a little stream running under there. I found a low spot, and the water seems to collect at the rate of about 2 gallons per day. What I would like to do is either cut a channel in the rock (bluestone, not granite) and direct the water either around the foundation, or into an outdoor sump-pit. I will welcome any diy solutions, as well as tips on what sort of contractor to call and what questions I should ask him. Thanks

Does anyone know how we could stabilize a brick structure without a roof? We have a historic building that was built in the 1850's, that was destroyed by fire except for the front room. We would like to save that facade on the street, but remove the roof and make it an open air type building. Any idea how to stabilize the walls and make it safe? Or do we scrap the idea and tear down the remainder of the building? We do not have a lot of money to put into the building, but we hesitate to tear down such a historic building. It needs to be safe more than anything.