153rd St and St. Nicholas Ave.
Rainwater is collected from the roof of the adjacent 1200 square foot 6 story building and stored in a 1000 gallon green polyethylene tank located on an 14 inch high platform made of 4 X 4s placed on gravel bed adjacent to the building. The system uses a 15 gallon roof washer to filter the rainwater. Overflow and winter flow is directed to the edge of the garden with a secondary backup 4 way tee which can send the water to the building storm drain. This system was built by Green Apple Corps members and volunteers under the supervision of GROWNYC staff. Based on an average rainfall of 34 inches during the season from March 1 to Oct 31 and .5 gallons of rain collected per square foot of roof area, we estimate having the potential to collect 20400 gallons for the season from 1200 sq ft of roof collecting area.