How much water after 20 years?

Just discovered that the condensation drain line for the central air unit was running down the inside of the crawl space wall and ended with about a 3 inch section coming out to just over the footer. It stopped there and has been draining directly into the crawl space dirt. I connected more pvc and ran into to a sump pump. When the air kicked on, water came out of there like turning on a faucet for a drink of water.

I was just wondering how much water is laying in the crawl floor after all these years.

Why would somebody do this???