Rainwater that falls on the roof of LeFevre Hall flows into a 1,000 gallon rainwater cistern located underground at the northwest corner of the building. Rainwater from this cistern is used to irrigate trees and shrubs that are just beginning to be established and during very dry periods, reducing the total amount of potable water used by the campus. In general, the campus selects native plant varieties that thrive in our climate, so regular irrigation is not necessary.