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CMP Part 4C. Water Supply <br /> uired Stor; 1 a hway 12 <br /> Population (E 800 800 1,200 1,600 <br /> Fire Demand(gpm)' 2,000 2,000 2,000 2,000 <br /> Max.Day Demand(gpm) 422 844 1,266 1,689 <br /> Peak Usage(gpm) 2,422 2,844 3,266 3,689 <br /> Firm Pumping Supply(gpm)2 500 500 500 1,000 <br /> Withdrawal from Storage(gpm) 1,922 2,344 2,766 2,689 <br /> Fire Flow Duration(hrs) 3 3 3 3 <br /> Fire Demand Storage(gallons) _ 345,960 421,920 497,880 484,020 <br /> Emergency Storage(gallons)3 121,536 243,072 364,608 486,432 <br /> Total Storage Needed(gallons) 467,496 664,992 862,488 970,452 <br /> Current Available Storage(gallons) 400,000 400,000 400,000 400,000 <br /> Net Storage Surplus/Deficit(gallons) -67,496 -264,992 -462,488 -570,452 <br /> (1)Fire flow requirements vary within the City depending on type and construction of <br /> facilities. Fire flow requirements for normal residential development vary between 1,000 <br /> to 1,500 gpm. For multi-family and commercial areas such as the downtown business <br /> district,residential apartment areas,school and industrial areas;flows of 3,500 gpm for 3 <br /> hours are generally considered acceptable. <br /> (2)Based on firm capacity listed in Table 4C-8 <br /> (3)Emergency storage equals 20%of maximum day demand. <br /> Water Distribution System <br /> General <br /> The analysis of a water distribution system often requires the use of a computer <br /> model of the system. A computer model is prepared which is calibrated with field <br /> data resulting in a model that simulates the known conditions of the system as <br /> closely as possible. This model provides a basis for simulation of existing system <br /> operations and deficiencies as well as future operating conditions of the system. <br /> From these simulations, determinations can be made as to the improvements that <br /> the system will need. <br /> The water distribution system for the City of Orono was modeled using Bentley's <br /> WaterCad version 8.0. Modeling information can be found in the Water Supply <br /> Plan, 2018. Key findings are summarized here. The computer network is used to <br /> on the system. Primary goals of the analysis included the following: <br /> City of Orono Community Management Plan 2020-2040 Part 4C, Page 14 <br />