🌱 Engineered Soil Media (85% Sand / 15% Organic), 24-48 Hour Drawdown Rule

Bioretention Rain Garden Filter Calculator

Size low-impact development (LID) bioretention cells and urban rain gardens under state stormwater design manuals: calculate surface ponding footprint (ensuring 6" to 12" temporary storage drains within 24 to 48 hours through engineered bioretention soil mix possessing 2.0 to 5.0 in/hr hydraulic conductivity), perforated underdrain pipes, and green infrastructure margins.

1. Project & Operating Inputs

Water Quality Volume to Filter (Cubic Feet e.g. 8,500 Cu Ft WQv)

Engineered Soil Media Infiltration Rate (Inches / Hr e.g. 3.5 in/hr)

Customer Bid Price for Excavated & Planted Bioretention Area ($)

Engineered Sand/Organic Media, Native Wetland Plants, Underdrain & Crew ($)

2. Financial Breakdown & Yield

LID BIORETENTION RAIN GARDEN

Turnkey Bioretention Cell Profit

Green Infrastructure Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost