My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
CCP 09-10-2001
ArdenHills
>
Administration
>
City Council
>
City Council Packets
>
2000-2009
>
2001
>
CCP 09-10-2001
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
5/8/2007 1:23:52 PM
Creation date
11/13/2006 2:37:16 PM
Metadata
Fields
Template:
General (2)
Jump to thumbnail
< previous set
next set >
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
390
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
<br />Within landlocked basins, lowest floor elevations must <br />be at least one foot above the surveyed basin overflow <br />elevation. <br /> <br />(k) Development resulting in the creation of impervious <br />surfaces must explicitly address use of best management <br />practices (BMP's) to first limit the loss of pervious <br />area; and second, to infiltrate runoff which does occur <br />from impervious areas to the extent feasible considering <br />site-specific conditions. BMP's include the use of <br />vegetated swales, pond outlets perched above groundwater <br />levels, use of infiltration systems, roof drainage to <br />pervious areas, minimum of twenty percent pervious <br />surface, use of depressed/casual storage areas, and <br />minimization of the number and width of parking stalls <br />and use of deep-rooted native vegetation, and narrower <br />"rural section" roads. <br /> <br />The goal of these BMP's is to incorporate practices into <br />the design which are capable of infiltrating the <br />impervious surface runoff from the Mpls-St.Paul median <br />storm (0.34 inches) in seventy-two hours. Infiltration <br />volume will be calculated using the appropriate <br />hydrologic soil group classification and saturated <br />infiltration rate from the table below. <br /> <br />Hydrologic <br />Soil Group <br /> <br />Infiltration <br />Rate <br /> <br />Soil Textures <br /> <br />A <br /> <br />0.50 in/hr <br /> <br />sand, loamy sand, or sandy loam <br /> <br />B <br /> <br />0.25 in/hr <br /> <br />silt loam or loam <br /> <br />c <br /> <br />0.10 in/hr <br />0.03 in/hr <br /> <br />clay loam, silty clay loam, <br />silty clay, or clay <br />for Small Watersheds, SCS, June <br /> <br />sandy clay loam <br /> <br />D <br /> <br />Source: <br />1986. <br /> <br />Urban Hydrology <br /> <br />Infiltration area will be limited to the horizontal areas <br />subject to prolonged wetting. <br /> <br />Areas of permanent pools tend to <br />capacity overtime and will not be <br />infiltration practice. <br /> <br />lose infiltration <br />accepted as an <br /> <br />(1) Landlocked basins may be provided with outlets only <br />if they: <br />(1) Retain a hydrologic regime which complies <br />with District Wetland Alteration Rule F. <br /> <br />13 <br /> <br />I <br />I <br />, <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />
The URL can be used to link to this page
Your browser does not support the video tag.