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TABLE 3.7
<br />CITY OF RAMSEY
<br />REQUIRED STORAGE BASED ON MAXIMUM DAY, FIRE PROTECTION
<br />AND EMERGENCY STORAGE CRITERIA
<br />Year
<br />2004
<br />2009
<br />2014
<br />_2020
<br />Fire Demand (gpm)t1»
<br />3,500
<br />3,500
<br />3,500
<br />3,500
<br />Max. Day Demand (gpm)
<br />4,097
<br />8,111
<br />10,277
<br />12,882
<br />Peak Usage (gpm)
<br />7,597
<br />11,611
<br />13,777
<br />16,382
<br />Firm Pumping Supply (2)
<br />2,895
<br />8,855
<br />11,395
<br />14,795
<br />Withdrawal from Storage (gpm)
<br />4,702
<br />2,766
<br />2,382
<br />1,587
<br />Fire Flow Duration (hrs)
<br />3
<br />3
<br />3
<br />3
<br />Fire Demand Storage (gallons)
<br />846,360
<br />497,880
<br />428,760
<br />285,660
<br />Emergency Storage (gals)1'3
<br />1,180,000
<br />2,336,000
<br />2,960,000
<br />3,710,000
<br />Total Storage Needed (gallons)
<br />2,026,300
<br />2,833,880
<br />3,388,760
<br />3,995,660
<br />Current Available Storage (gallons)
<br />2,000,000
<br />2,000,000
<br />2,000,000
<br />2,000,000
<br />Net Storage Surplus/(Deficit) (gallons)
<br />(26,300)
<br />(833,880)
<br />(1,388,760)
<br />(1,995,660)
<br />Net Storage Surplus/(Deficit)
<br />Rounded (gallons)
<br />(26,300)
<br />(850,000)
<br />(1,400,000)
<br />(2,000,000)
<br />(1) Fire flow requirements vary within the City depending on type and construction of facilities. Fire flow
<br />requirements for normal residential development vary between 1000 to 1500 gpm. For multi -family and
<br />commercial areas such as the downtown business district, residential apartment areas, schools and industrial
<br />areas; flows of 3500 gpm for 3 hours are generally considered acceptable
<br />(2) Based on current firm capacity combined with the projected well implementation plan
<br />(3) Emergency storage equals 20% of maximum day demand
<br />3. Water Storage Infrastructure Needs
<br />The recommended additional required storage is based on the higher of the average day
<br />needs or maximum day. fire protection and emergency storage needs. Based on current water use
<br />patterns, average day criteria governs for current water use patterns.
<br />Thus, an additional 2.9 million gallons of storage is required within the next 10 years.
<br />City of Ramsey, Minnesota — M21.34343 Page 3-8
<br />Water System Study Prepared by Bolton & Menk, Inc.
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