The Truckee Meadows Structural Controls Design ... - City of Sparks

* Fill out worksheet from top to bottom
Version 1.01 Released April 2007
Designer: page 1 of 1
Company:
Date:
May 4, 2007
Project: Subbasin #
Location:
Key: User Input
1. Water Quality Volume (WQ V) - Infiltration Trench Storage
a) Percent of Watershed Impervious Area = I I = %
b) Drainage Area = A (ft 2 ) (43,560 ft 2 = 1 acre) A = acres
- maximum drainage area 5 acres
c) Watershed Runoff Coefficient = R v (unitless) R v =
d) 90th Percentile Precipitation Depth = P (inches) P = in
e) Water Quality Volume = WQ V (ft 3 ) WQ V = ft 3
2. Infiltration Trench Dimensions
a) Surface Area (SA) of Trench SA = ft 2
b) Porosity (void space of rock matrix) (unitless)
c) Total Trench Voume = V T V T = ft 3
d) Depth of Trench = D (recommended min 3 feet, max 6 feet) D = ft
3. Infiltration Trench Floor Slope
not to exceed 1% %
Notes:
Truckee Meadows Regional Storm Water Quality Management Program
Design Guidance Worksheet: Infiltration Trenches TC-20
Calculated Result Italicized Font Indicates Value is Outside Recommended Range
Original worksheet developed by and used with the permission of the Urban Drainage and Flood Control District (UDFCD) in Denver, Colorado. The original worksheet was
modified and adapted for the Truckee Meadows Regional Storm Water Quality Management Program by Kennedy/Jenks Consultants.
end of worksheet