"Daylighting" explained

Trout Brook long had been buried in a pipe by the railroads, which laid tracks atop the stream bed to ensure a smooth descent into the downtown yards.

Now a new and winding stream bed for the brook, which runs through a storm water tunnel near Interstate 35, has been carved down the middle of the 42-acre Trout Brook Nature

Sanctuary and Regional Trail, which is slated for official opening next spring.

It’s called “daylighting,” the process of unearthing a stream typically filled in by urban development, and it’s an increasingly popular strategy to improve water quality and aid neighborhoods in need of natural amenities...

Daylighting streams is occurring across the country and overseas, in places such as Hutchinson, Kan.; Yonkers, N.Y.; and Seoul, South Korea. National Geographic reported last year that more than 70 percent of streams are paved over in some cities...

Further details at the StarTribune.