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Lino Lakes, MN Water Storage Analysis
<br />Water Use Projections & Storage Requirement
<br />Calculation
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<br />Design Year 2020 2030 2040 |Equation
<br />With 3 Hour Fire With 3 Hour Fire With 3 Hour Fire
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<br />Estimated Population 18,250 24,900 29,900 |A
<br />Per Capita Water Use (gpd/capita)100 100 100 |B
<br />Average Day Water Use (gpd)1,825,000 2,490,000 2,990,000 |C= A*B
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<br />Max/Avg Day Ratio 3.57 3.57 3.57 |D
<br />Maximum Day Water Use (gpd)6,515,000 8,889,000 10,674,000 |E= C*D
<br />Maximum Day Water Use (gpm)5430 7410 8900 |F= E»time
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<br />Firm Pumping Firm Capacity (gpm) -Pumps to System 4345 6345 8345 |G
<br />5214000 7614000 10014000 |
<br />Design Fire Fighting Rate (gpm)3500 3500 3500 |H
<br />Fire Fighting Duration (hour)3 3 3 |I
<br />Design Fire Fighting Volume (gal)630,000 630,000 630,000 |= H*I*60
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<br />TOTAL Coincident Demand (gpm)8,930 10,910 12,400 |J= F+H
<br />Required Draft From Storage (gpm)4,585 4,565 4,055 |K= J-G
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<br />Adjusted Fire Fighting Storage (gallons)825,000 822,000 730,000 |L= K*I*60
<br />Equalization Storage (gallons)1,628,750 2,222,250 2,668,500 |M= E*equl
<br />TOTAL Storage Need (gallons)2,453,750 3,044,250 3,398,500 |N= L+M
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<br />Existing Elevated Storage (gallons)2,000,000 2,000,000 2,000,000 |P
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<br />Additional Storage Need (gallons)453,750 1,044,250 1,398,500 |Q= N-P
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<br />Assumptions:|
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<br />Time to Supply Max Day |
<br />20 |time
<br />Equalization Storage |
<br />25%|equal
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