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-A <br />SEH <br />Table 7.1 - Projected Wastewater Flows (2007 - 2030) <br />Year <br />2007 <br />2010 <br />2015 <br />2020 <br />2025 <br />2030 <br />Sewered Population <br />125 <br />170 <br />242 <br />313 <br />384 <br />455 <br />Unsewered <br />Population <br />294 <br />320 <br />320 <br />320 <br />320 <br />320 <br />Sewered <br />Households <br />50 <br />54 <br />77 <br />100 <br />141 <br />181 <br />Unsewered <br />Households <br />93 <br />120 <br />120 <br />120 <br />120 <br />120 <br />Sewered <br />Em to ment <br />548 <br />720 <br />780 <br />840 <br />855 <br />870 <br />Sewered <br />Commercial Acres <br />46.7 <br />46.7 <br />46.7 <br />46.7 <br />46.7 <br />46.7 <br />Average Annual <br />Wastewater Flow <br />GD) ** <br />0.051 <br />0.059 <br />0.066 <br />0.073 <br />0.078 <br />0.084 <br />Allowable Peak <br />Hourly Flow <br />MGD <br />0.21 <br />0.24 <br />0.26 <br />0.29 <br />0.31 <br />0.34 <br />**Flows determined as follows: 75gal/day-person population, 25gal/day- <br />person employment & 600gal/day-acre commercial <br />Existing & Potential Sanitary Sewer Related Issues <br />To continue with the `rustic' feeling of the City in a natural environment and to <br />maintain the low -density development desired, the following shall be considered <br />the goals of the City of Gem Lake sanitary sewer plan: <br />A. Zoning and lot sizes will be regulated to allow adequate space for onsite septic <br />systems in residential areas. Current rules require adequate space for a second <br />drain field on each residential tract, in case the first one fails. <br />B. All onsite septic systems in the City are inspected bi-annually to insure the <br />correct operation of these systems. Inspections are performed by the City's <br />contracted inspector. <br />C. A backup plan for providing a City operated sanitary sewer system has been <br />developed and will be put in place if necessary in any area of the City where <br />onsite septic systems cannot operate. <br />Within these goals the following specific items have been implemented: <br />A.City-wide Sanitary Sewer System Plan was developed for the City in May <br />2007. This plan provides for a potential municipal sanitary sewer connection for <br />each part of the City that could possibly use gravity flow sewer. This plan does <br />require extensive excavation and construction through some of the areas of the <br />City. <br />7.0 sanitary sewer system plan I page 44 <br />