HomeMy WebLinkAboutBLD2022-00458-05- StormwaterReceived 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Received 08/08/2022
Rain Garden Calculations for 141 Alder Drive, Port Townsend, WA (BLD 2022-00458)
Climate Zone: Region 1 (less than 30” per year)
Drainage Rate: 0.10 to 0.24 inches/hour
Roof Area: 3,500 square-feet
Target: Capture 95% of water from contributing areas)
Size factor from table: 9%
Ponding Depth: 6 inches
Calculated Top Surface of Ponding Area: 3500 x 0.09 = 315 square feet