Hi all! thanks for taking time in your busy schedule to lookup my thread! I've created this design for a proprety situated in the Saguenay region, in Quebec. My main worry relates to the construction of a dam to try and reduce seasonal floods. It is my first design, and I wouldn't want to make any crucial mistakes. It is a challenging site, for the following reasons: -Complicated site-scale topography. Composed of large mounds/car-size-clumps of almost pure grey clay (upon which trees, bushes and herbs have grown) randomly positioned within an almost pure sand. Topsoil is generally shallow, sometimes inexistent. -Situated half-way between a marshy plateau and a valley that empties into the Saguenay river, there are lots of run-off waters. -Over exploitation of trees by upper (west) neighbours, insufficient topsoil to absorb run-off waters, and compaction by animals (horses, and humans) results in regular floods, especially in spring and fall. -Local people also say there are underground veins of water that contribute to the accumulation and running of water in some areas. It does seem to be the case. -Streams are very shallow (one or two feet deep) and run on clear sand. -Surrounding forests are quite marshy, but there are zones where trees have favoured soil stabilization and accumulation. On the other hand, there are quite a few great aspects to the site too : -Water! There is a great opportunity here to build a very fertile piece of land by installing different types of water harvesting features. -Clay. Good, almost pure clay that can be harvested wisely to build excellent ponds, and other catchment features. -Forest. A fair variety of plants and trees that encourage soil building and stability, provide food and medicine, as well as shelters for diverse wild animals (deer, hare, birds, mice, squirrels, and others), which in turn may be integrated to the subsistence strategy. Very importantly, the tree belt surrounding Fanny and Jean’s land creates a microclimate. According to them, and from what I’ve experienced, temperatures seem to be more stable year-round, and while it remains strangely cool(er) during the summer, it is about 8°C warmer there during the winter. If you look at the design, you will see ponds named : duck pond and wildlife ponds. Knowing that waterflows into the site from the West (blue arrows on image 1), I'd hope that a dam (with keypoint and all) would prevent run-off water from flooding the site each sprinf and autumn. Do any of you see any problem with this theory? Or other problems, of course!!