One of the most popular sites along the Kancamagus Scenic Byway will be closed for the summer as it undergoes upgrades and restoration. Lower Falls will close starting Monday for renovations that will make it safer and protect the habitat. It's expected to reopen in mid-November. Colleen Mainville, a spokeswoman for the White Mountain National Forest, says the site has been "very loved.'' The project will: --Define pathways to keep people from wandering off, which increases erosion and damages plants --Protect the Swift River from sedimentation and road-salt runoff by installing drainage in the parking lot --Improve accessibility throughout the site, including a viewing platform and access to a picnic pavilion that dates to the Civilian Conservation Corps during the 1930s.