HomeMy WebLinkAboutConsultant Review - 257 BRIDLE PATH INFILTRATION SYSTEM SIZING CALCULATIONS
CALCULATE RUN OFF VOLUME FOR NEW ADDITION
Roof area of new addition= 1136 square feet
100 year rainfall amount(see rainfall data map)=6.5 inches
Total run off= 1136 square feet x 6.5 inches/ 12 inches/foot= 615 cubic feet
CALCULATE NUMBER OF HIGH CAPACITY INFILTRATOR CHAMBERS
NEEDED
Total run off=615 cubic feet
Volume of each chamber= 16.3 cubic feet
Number of chambers required=615 cubic feet/ 16.3 cubic feet/chamber=38 chambers
DETERMINE CHAMBER CONFIGURATION
Use 7 rows(20 feet wide) of leach chambers with 6 chambers in each row(37.5 feet
long)
Total number of chambers=42
FINAL CAPACITY OF LEACH CHAMBER SYSTEM
Total number of chambers=42
Storage in each chamber= 16.3 cubic feet
Total volume of storage= 16.3 cubic feet/chamber x 42 chambers=684 cubic feet