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CMP Part 4C. Comprehensive Sewer Policv Plan <br /> SEWER FACILITIES PLAN <br /> Orono's Plan for future sewer facilities includes upgrades to certain existing <br /> local sewer facilities as well as retrofitting a small number of existing <br /> neighborhoods with municipal sewer service. These system improvements <br /> and expansions are not expected to require addi�ional capacity allocation in <br /> metropolitan sewer facilities. Any potential need for additional capacity in <br /> metropolitan systems is tied directly to past revisions to the Land Use Plan in <br /> 2000 which allowed for increased housing density. The increased housing <br /> density was necessary in order to meet identified City housing needs as well <br /> as to be consistent with the Metropolitan Council's life-cycle housing goals. <br /> The existing population and household ratio is split 70% sewered and 30% using <br /> septic systems. There are estimated for year 2008 approximately 3,350 occupied <br /> and vacant residences in Orono of which 2,300 are connected to sewer and 1,050 <br /> utilize on-site systems. <br /> In terms of Residential Equivalent Connections or REC's (1 REC = 274 gpd = <br /> 100,000 gpy), Orono in year 2008 is estimated to have 2,585 REC's (as compared <br /> to 2,420 REC's in 2000 and 1,987 REC's in 1990) which translates to an annual <br /> flow of 258.5 million gallons per year. Orono's actual annual flows for 1985- <br /> 2007 are shown in the following chart: <br /> Annual Sewer Flows 1985-2007 <br /> 300 <br /> 262 <br /> 250 <br /> 250 I 241 <br /> 232 <br /> I214 224 221 221 219 227 <br /> 208 213 <br /> 201 <br /> 200 190 194 �91 193 <br /> � 167 175 179 178'� <br /> � 161 158 <br /> 3 i <br /> ° 150 I i <br /> _ i <br /> a I <br /> 100 <br /> 50 II <br /> p ' _ . _ _ _. ..._ _ . _. _ _ <br /> ^�'���.�'06�.�'�� ^�0��.90��A�'�qA�'I`.��u''L.�°�u''y^�+v'a^°�o��^��'6 r�°�o'� .�A�'0.�°���i ��O ��,• ��`L ��'S ��P ��0 ��0 O�'` <br /> ti ti ti ti ti ti ti ti <br /> The CSPP element of the 1980 CMP indicated an ultimate interceptor design <br /> capacity assigned to Orono of 3,025 units based on a flow of 368 gpd per unit <br /> (115 gal/person/day x 3.2 persons/household) totaling 1.14 mgd or 416 million <br /> gallons per year (MGY). Current City forecasts as shown in Tables 4C-11 and <br /> 4C-12 indicate that Orono's estimated annual flows for 2010, 2020 and 2030 are <br /> expected to be equal to or less than the ultiinate interceptor design capacity. <br /> City of Orono Communit�� Management Plan 2008-2030 Page 4G�2 <br />