Can a man made tunnel throw a Mountain, or a dam, or road, affect local weather o climate?

There is a dam near me, and since it was made, the locael climate is rainier, so they say. So It might be possible, Anyone know any cases? I tried looking on google but nothing....|||I dont think a tunnel would cause the climate to change unless it disturbed water flow, which some do. A dam definitely can, especially if the lake is big, and one road wont change climate but lots of them together do because concrete retains heat more than natural landscape, which is why big cities are hotter than surrounding countryside, it's called the heat island effect.|||Large dams certainly do have an environmental impact. Apart from the loss of habitat as they fill, they then go on to cause minor earthquakes as the mass of water loads up the earth's crust.





Climatic change on a very small scale might be possible since such a large body of water must be creating a lot of water vapour (and hence it is being argued rain). The argument needs to be looked at very carefully to find the truth. Are there before and after records of rainfall (anecdotes don't count)? If there was a change in rainfall patterns can it be shown to be related to the location of the dam?





Most rainfall in the UK comes from depressions and their associated frontal systems, so it would be rather difficult to show that a dam was causing a local increase as the rainfall is so variable. Micro-climates do exist, but it sounds to me like a phD thesis to prove this one or not.|||Everything we do has some effect, but building a dam probably won't make a measurable change to the rainfall.|||It is just a coincidence unless the lake is huge. You get lake effect snows off of the great lakes.|||No , thats ridiculous!