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Size of a Rain Garden: Spreadsheet Instructions

Calculate the drainage area for the rain garden using site plans. Adjust the Device Storage Depth and Soil Depth to reflect your design. Ideally, the rain garden should be large enough to infiltrate 90% of the runoff generated in the drainage area. Adjust the device area to get as close as you can to this goal while staying within the space constraints of your site.

Sizing Tool [MS Excel, .xls]

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	Benefits
	Sustainable School Projects will: Help reduce impacts of stormwater runoff Develop educational and recreational landscapes Provide sense of ownership and pride Enhance community awareness Support current curriculum Low cost to school

	Project Steps
Step 1 - Let's Begin Step 2 - Goals/Objectives & Budget Step 3 - Gather Information Step 4 - Location & Size Step 5 - Designing Step 6 - Selecting Plants Step 7 - Design Review & Obtaining Permission Step 8 - Preliminary Plans for Construction Day Step 9 - Construction Step 10 - Advertise Step 11 - Develop Timeline Step 12 - Construction Day Step 13 - Maintenance Step 14 - Write Summary Report