County falsely listed land as usable - Exit strategy needed!

[Nate Hananger]

I purchased a property at a tax auction in Thurston County, WA. 

The lot was listed as usable. They did not zone it as "wetlands". However, the lot is not usable. The neighboring HOA park consistently flows water onto the lot in a steady stream about 6" inches deep. There is also a culvert dumping onto the lot that the county denied was their doing, but it's connected to the culvert from across the street, as part of the storm ditch.

I know of the standard "Buyer Beware" terms and conditions for auctions. But this water problem was not there when I first viewed the lot. Public records did not disclose it either.  

I may have to donate it for tax credit and take a hit. But I'd like to consider alternatives. Are there any options to resell the lot to the county for failing to properly zone it as wetland?