Hello, I am looking at a damaged floor of a home/pole barn - the subfloor is rotten and about to fall through in a couple areas, and the floor joists are (some, very) moldy. In the back left and right corner of the crawl, there are two large pools of water - possibly from where the rainwater collects and does not flow away from the home. What are some approaches to fixing the water shed problem? Will venting the crawl space do much for the two large pools of water, or is this something an excavator needs to be called in to do? Thanks for your time.