We have an approximately 25-foot tall Weeping Alaska Cedar in our backyard, outside of Seattle (zone 8, I think). The tree has two, side-by-side trunks of approximately 6 inches dbh, and the trunks are approximately the same height. In a recent windstorm, one of the two blew down, and we can see that it has split the trunk/root ball down the center. My question is, can the remaining tree survive if we treat the exposed portion of the "trunk/taproot" and fill in the hole around it? Or, will the the trunk and root system simply rot in any event and fall in the next big storm or two? . As an additional consideration, the tree was planted near a french drain and catch basin that conveys quite a bit of groundwater throughout the year, due to the high water table in our area. There are a number of small seeps and springs in the neighborhood, including one in our next-door neighbor's yard. From reading older threads on this site, I realize that these trees (which are actually cypress, I know) prefer well-drained sites. Given the nearby french drain and catch basin, it is hard to tell whether the tree's exact location would qualify. There is also a fair bit of clay in the soil. Thanks in advance for your comments/suggestions