424 miles of pipe ranging in size from 1 inch to 48 inches ranging in age from new to 120 years old
TRANSCRIPT
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City of DuluthWater System Needs
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Summary of System
•424 miles of pipe•Ranging in size from 1 inch to 48 inches•Ranging in age from new to 120 years old
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Age of Water Mains
Decade Age Length of Pipe (Miles)1880-1889 121-130 25.381890-1899 111-120 26.461900-1909 101-110 39.081910-1919 91-100 74.841920-1929 81-90 44.421930-1939 71-80 20.971940-1949 61-70 23.951950-1959 51-60 34.361960-1969 41-50 26.101970-1979 31-40 26.811980-1989 21-30 14.571990-1999 11-20 24.582000-2009 1-10 43.62
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Age of Water Mains•Over 50% of the system is greater than 80 years old
•50 miles of pipe were installed before 1900
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Water Main Breaks•51 breaks in 1971•163 breaks in 2007 (highest year)•140 breaks per year average (last 5 years)•Average cost per break of $7,200•Total current annual cost 140 x $7200 = $1,008,000
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Water Main Breaks
Decade Breaks per Year1930's 41940's 61950's 111960's 301970's 501980's 551990's 552000's 141
Average Water Main Breaks per Year per Decade
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Water Main Breaks
0 50 100 150 200 2501900
1920
1940
1960
1980
2000
2020
Breaks per Year
Ye
ar
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Water Main Leaks•Water leaks within the City are also excessive
•Over the last 5 years we averaged 180 leaks
•Typical water loss exceeds 14%
•This costs $345,000 a year
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Water Main Leaks• 180 water leaks on average per year
•Total current annual cost 180 x $7200 = $1,296,000
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Water Main RepairsFuture Costs
•Breaks are expected to reach 300 per year in 10 years
•Leaks repairs will be over 200
•Total annual cost 500 x $7200 = $3,600,000
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Pumping Stations
•12 Pumping Stations are required to move water throughout the City.
•A breakdown at a major station could put 1000’s of homeowners out of water
•2 stations in poor condition
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Pumping Stations
•Woodland Pumping Station
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Pumping Stations
•Woodland Pumping Station•Pumps and controls over 50 years old•Replacement parts not available
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Pumping Stations
•Middle Pumping Station•One pump over 60 years old
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Storage Facilities•West Duluth Reservoir needs new roof
•Estimated Cost of $5 million
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Lakewood WaterTreatment Facility
•Original pump station built in 1898 still used•Original filtration plant built in 1975•Much of the equipment is original and needs replacement
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Lakewood WaterTreatment Facility
•Sedimentation Pond Cleaning•Estimated cost of $2 million•Partial cleaning required immediately at cost of $420,000
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Lakewood WaterTreatment Facility
•Lift Pump switchgear•Estimated cost $280,000
•Filter control panels•Estitmed cost $140,000
•Pump Station electric service•Estimated cost $75,000
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Lakewood WaterTreatment Facility
•Backwash motor control center•Estimated cost $610,000
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Lakewood WaterTreatment Facility
•Other electrical upgrades•Estimated cost $1,600,000
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Lakewood WaterTreatment Facility
•Pump Station roof•Estimated cost $650,000
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Lakewood WaterTreatment Facility
•Other improvements/replacements over next 15 years - $20 million
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Future of the Water System•Water main breaks must be reduced or repair costs will be excessive
•500 repairs per year X $7,200 per repair = $3,600,000 per year in repairs
•Maintenance projects can not be delayed indefinitely
•Failure at the plant or a pump station could shut off water service for days or weeks