My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
Item 4 - PH on MWMC Reg. SDCs
COE
>
City of Eugene
>
Council Agendas 2004
>
CCAgenda-06/14/04Mtg
>
Item 4 - PH on MWMC Reg. SDCs
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
6/9/2010 1:10:03 PM
Creation date
6/10/2004 3:21:26 PM
Metadata
Fields
Template:
City Council
City_Council_Document_Type
Agenda Item Summary
CMO_Meeting_Date
6/14/2004
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
119
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
SYSTEM DEVELOPMENT CHARGE METHODOLOGY <br /> <br />Current average flow (presented as DSMM) = ((129 x 217,737 x 1.5)/1,000,000) + 1.7i = 43.8 <br /> Where: <br /> <br /> 129 is the average gallons per capita per day (gpcd) of the dry season values from <br /> 1990 to 2002 <br /> <br /> 217,737 is the population served in 2002 <br /> <br /> 1.5 is the selected peaking factor to convert average dry season flow to maximum <br /> month dry season flow (based on 1990 to 2002 data) <br /> <br /> 1.7i is the current industrial flow in mgd <br /> <br />The available capacity in terms of average flow is 5.2 mgd (49 - 43.8). <br /> <br />The projected 2025 average flow is determined as follows: <br /> <br />Projected 2025 average flow (presented DSMM) = ((129 x 297,585 x 1.5)/1,000,000) + 1.7 = <br />59.3 mgd <br /> <br /> Where: <br /> <br /> - 129 is the average gpcd of the dry season values from 1990 to 2002 <br /> <br /> - 297,585 is the projected population to be served in 2025 <br /> <br /> - 1.5 is the selected peaking factor to convert average dry season flow to maximum <br /> month dry season flow (based on 1990 to 2002 data) <br /> <br /> - 1.7 is the projected industrial flow in mgd (it has been assumed that the <br /> industrial flow will remain constant over the study period) <br /> <br />The total required capacity to meet the needs of growth in terms of average flow is 15.5 mgd <br />(59.3 - 43.8). <br /> <br />Peak Flow <br />A summary of the peak flow breakdown is presented in Table C-2. The existing capacity in <br />terms of peak flow is not defined in the NPDES permit, but the plant was originally <br />designed for a peak flow of 175 mgd, and therefore that is defined as the existing capacity. <br />MWMC does not currently have the collection and treatment capabilities to accommodate <br />the existing peak flow (which is greater than 175 mgd), and therefore the current peak flow <br />loading (required capacity) cannot be explicitly measured at the WPCF. Using a computer <br />model of the collection system MWMC is able to estimate the current peak flow. DEQ <br />defines the peak flow as the peak hour or peak instantaneous flow that occurs during the <br />5-year, 24-hour storm (3.9 inches of rainfall). Under these rainfall conditions, the model <br />predicts a current flow of 264 mgd. Therefore, there is no available capacity in terms of peak <br />flow. Since the current average flow is 43.8 mgd, the current wet season I/I is 220.2 mgd <br />(264 less 43.8). <br /> <br />Using the projected future 2025 population and land use, the model predicts peak flows of <br />294 mgd without I/I reduction efforts outlined in the 2000 WWFMP and 277 mgd with I/I <br /> <br />SEA31003271388(DG).DOC/041040034 <br /> <br /> <br />
The URL can be used to link to this page
Your browser does not support the video tag.