PRESERVATION%20to%20CARTER%20LAKE%20PRESERVATION%20SOCIETY

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PUBLIC MEETING of the CARTER LAKE PRESERVATION
SOCIETY regarding the CARTER LAKE WATER
SUPPLY and REMOVAL SYSTEM July 13, 2006
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PROJECT SPONSORS

• City of Carter Lake
• City of Omaha

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SCOPE OF SERVICES

• Task 1 Data Collection
• Task 2 Water Input Alternatives
• Task 3 - Evaluation of Water Input Alternatives
• Task 3A - Evaluation of Water Removal
  Alternatives
• Task 4 Permitting Analysis
• Task 5 - Project Report

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PROJECT GOAL

• Maintain Carter Lake at a
• desired elevation 970.3 feet msl
• Range 969.8 to 970.8 feet msl

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PROJECT ACTIVITIES

• Review historical documents
• Evaluate existing inflow sources
• Evaluate existing outflow points
• Evaluate new inflow sources
• Evaluate new outflow points
• Prepare report
• Regulatory agency input
• Government entities input
• Public input

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CARTER LAKE DRAINAGE AREA
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EXISTING INFLOW

• Storm water drainage
• Precipitation
• Missouri River piped connection
• EXISTING OUTFLOW POINTS
• Evaporation
• Seepage
• Pumping

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NEW INFLOW SOURCES

• Wells
• Collectors
• Angle
• Vertical
• Missouri River piped connection
• New Storm water

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COLLECTOR WELL
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ANGLE WELL
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VERTICAL WELL
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INFLOW PUMPING

• Lake area 323 acres
• To raise lake level one (1) inch it requires
  8,770,500 gallons of water
• Assuming a pumping rate of 2,000 gpm, it takes 73
  hours to raise lake level 1 inch

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INFLOW PUMPING

• Location issues
• City of Omaha property
• City of Carter Lake property
• Private property
• Capital cost
• Operation Maintenance cost
• Water quality issues

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NEW OUTFLOW POINTS

• New Pump Station Force Main Parallel to
  Existing System
• New Pump Station Force Main From Vicinity of
  Abbott Drive Locust Street to Missouri River

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COST ESTIMATES
Under Development
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PROJECT ISSUES

• Multiple Jurisdictions
• Permitting
• Funding/ Financing
• Operation Maintenance

City of Carter Lake State of Iowa
City of Omaha State of Nebraska
Pottawattamie County Papio-Missouri River NRD
Douglas County
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PRELIMINARY RECOMMENDATIONS

• Conduct Test Drilling Sampling to determine
  water quality
• If satisfactory, conduct Test Drilling Pumping
  to determine water quantity
• Iterative Process?
• If Successful
• Phase II - Design
• Phase III - Construction

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• Summary
• Carter Lake needs a reliable source of inflow
  water if a stable lake level is to be maintained
• Wells can provide this reliability
• Storm water flow can augment wells