11-22-1999 Council Work Session - Laserfiche WebLink

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SEWER FACILITIES PLAN Oron o*s plan for fatqre sewer facilities is co usistent with the existing loc al and metro po litan sewer facilities capacities: is co muteut with Oron o 's natural features and enviro nmental preservation plans: and is con sistent or ith all ot her elements o f Oron o*s Com munity Management Plan. The existing sewer system capacity is sufficient to acco mmod ate all fore cast population growt h and urban develop ment witho ut requiring increased municipal or interceptor capacity. Orono*s Plan for future sewer facilities will require specific up2rades to existing local sewer facilities, but is not expected to require additional capacity allocation in metropolitan sewer facilities. Anv potential need for additional capacity in metropolitan systems is tied directly to changes in the Land Use Plan which will allow for increased housing density. The increased housing density is necessary in order to meet identified City housing needs as well as to be consistent with the Metropolitan Council ’s life-cvcie housing goals. The existing population and household ratio is split 00% urban and 40% rural 65% sewered and 35% using septic systems. There are estimated for year 2000 now 2,430 approximately 3.020 full time households residences in Orono of which 1,450 1.950 are connected to sewer and 980 1.070 utilize on-site systems. Even if all of the Metropolitan Council's forecast growth of 750 new households between 1980 and 2000 were to be located in the urban area, the exis ting 1,230 available sewer units would be sufficient to prov ide for this growth: In terms of Residential Equivalent Connections or REC’st I REC = 274 gpd= lOO.OOOgpv). Orono in year 2000 is estimated to have 2.420 REC’s (as compared to 1.987 REC’s in 1990) which translates to an annual flow of 242 million gallons per year. Orono’s actual annual flows for 1985-98 are shown in Table The eSPP element of the 1980 CMP indicated an ultimate interceptor design capacity assigned to Orono of 3.025 units based on a flow of 368 gpd per unit (115 gal/person/day X 3.2 persons per household) totaling 1.14 mgd or 416 million gallons per year (mgv). Current Citv forecasts as shown in Figures and_____indicate that Orono’s estimated annual flows for 2000. 2010 and 2020 are expected to be equal to or less than the flows anticipated bv Metropolitan Council in the Water Resources Management Plan. In addition to the-abcrv e-absoliite capacin*. Orono has sufUcient rural land ava ilable to permit all or most of the forecast devel opment to occur in the rural area at exis ting rural densities consistent with rural land use. env ironmental protection and permanent on-site sesv er system operation. Recentdev elopment trends lu»e witnessed approximately 60% of the annual residential develop ment occurring in the rural area: Orono has sufficient land available in the Rural Area for the level of rural unsewered development currently forecasted. Likewise. Orono has sufficient land in the existing urban area and in the few areas proposed for conversion from rural to urban development, to allow For the forecast levels of urban development. The urban and CMP 6-41 I I I I I I I I I I I I I I I I I I J