I would assume that the water is coming in under the footing due to ground water. It sure looks to me that the entire footing is exposed, not just the frost wall. I would assume (have no idea where your located) they contractor only draintiled the exterior of the crawlspace, hence no visible bleeders. Odds are the ext. tile are higher than the stone in your crawlspace, making the interior the week point for water. Maybe dig down inside the gravel to see where the footing ends. Also, I can't believe a 2 or 3" concrete "slop" floor wasn't at least installed in 2001, much less a VB
? Unless there is a VB
under the stone we cant see. Either way, It's kind of rediculous (IMO) they didn't pour any kind of floor when the home was built. I've done the retro-pour of crawlspace floors, talk about a pain in the back!