Rogers Refuge, a special spot in Princeton just below the Institute Woods. It's owned by the American Water Company. They have a few wells there, but it also serves as a haven for 200 species of birds attracted to its deep forests and extensive marshes.
Now, with pavement laid in short sections where the washouts used to occur, plants growing in the lower marsh will no longer get smothered in gravel, and there won't be an ongoing need to bring heavy equipment in to keep the road open. I'm sure state regulations and the Department of Environmental Protection made it very difficult to get permits to do this (I've heard it was a three year process!), but the result is positive for the wetland, and for anyone wishing to visit.
The most remarkable thing about this, for me personally--having advocated over the years for so many things in Princeton--was to return and find that the water company had actually gone ahead and done it. I've encouraged the township to pave a similar patch of unpaved driveway that sends gravel downstream at Mountain Lakes Preserve, but the regulatory hurdles may have proven too difficult to overcome.
More info on Rogers Refuge at www.rogersrefuge.org.