Genesee Advanced Water Treatment Facility

Transcription

1 Genesee Advanced Water Treatment Facility State Revolving Fund Loan Public Hearing April 28, 2015

2 Project Purpose Upgrade critical components of the District's water system Develop a more robust water treatment facility that is capable of treating more challenging water and meeting future regulations Upgrade critical facilities to reduce electrical consumption, water use and operator time Photos of the Existing Genesee WTP

3 Upgrades to Base and Larkspur Pump Stations Replace equipment and electrical gear that is near the end of its useful life System upgrades will significantly reduce energy use for these facilities (estimated at 29% / 37%) Reduce operating costs (estimated at 37%) Provides better system function with fewer pumps for delivering a range of flows into the distribution system The Larkspur Pump Station is over 30 years old

4 Replacement of Pressure Reducing Stations (PRS) Removes stations that are located in roadways and don t have proper traffic loading Replaces facilities that are deteriorating and have reduced reliability Provides systems with proper ventilation and access to increase operator safety Provides new systems with the capacity needed to deliver higher flows for fire protection Old Pressure Reducing Stations will be replaced with new, reliable units

5 Replacement of Customer Water Meters Water industry standards recommend that meters be replaced every 15 years New units will reduce underrecording water use New units will include remote monitoring capabilities, thereby significantly reducing operator time used for meter reading New customer water meters will include remote monitoring capabilities

6 Construction of a New Advanced Water Treatment Facility (WTF) The existing water treatment plant is over 30 years old and approaching the end of its useful life The existing plant treatment processes were designed to meet less stringent filtration performance requirements The new Advanced WTF will be capable of treating more challenging raw water and meet future regulations The new Advanced WTF will provide enhanced treatment for removal of organic compounds The Genesee Raw Water Reservoir

7 Recommended Water Treatment Process Six potential processes were identified that can meet overall treatment goals An evaluation was performed that analyzed both benefits and costs for each system (costs include capital and O&M) Microfiltration with floc/sed pretreatment and granular activated carbon post treatment was selected Provides the highest Benefit Score Provides the highest Cost to Benefit Score Cost competitive compared to other options Positions the District well for future raw water quality challenges and potentially changing regulations Relatively simple and reliable to operate

8 Plant Site Selection Considerations Space Site and Building Access (trucks, chemicals, eqpt, FD) System Hydraulics Residuals Management and Disposal Utilities Land Acquisition Requirements Environmental Considerations Aesthetics and Public Perception Constructability / Cost

9 Site Design Concepts Locate the facilities on District property Keep the roof level as low as possible Keep as many large trees as possible Provide functional site access Integrate the plant into site contours View of the Administration Building / Advanced Water Treatment Facility Site from Daisy Lane

10 Architectural Renderings of the New Genesee Advanced WTF

11 Site Rendering

12 Project Budgets LOCATION INITIAL PROJECT BUDGET Advanced Water Treatment Facility $8,320,000 Pressure Reducing Stations (PRS) Stonecrop PRS $135,000 Holly PRS $145,000 Montane East PRS $145,000 North Bowl PRS $145,000 Pump Stations Base Pump Station $410,000 Larkspur Pump Station $410,000 Customer Water Meter Replacement $400,000 Financing/Issuance Costs $190,000 TOTAL $10,300,000

13 Impacts to Customer Water Bills Operation of the new Advanced WTF could increase operating costs from $275,000 per year up to $320,000 to $340,000 per year Increased operating pressures for the microfiltration system Chemicals for cleaning of the membrane system Replacement of Granular Activated Carbon However, upgrades to pump stations will result in an approximate $50,000/year cost decrease Efficiencies with reduced operator time and lower water use have not been taken into account In addition, Genesee repaid some bonds for the reservoir project early and refinanced the debt, thereby decreasing the mill levy for 2015

14 Project Locations

15 Federal Agencies Contacted U.S. Fish and Wildlife State Engineers Office, Colorado Division of Water Resources Colorado Historical Society U.S. Army Corps of Engineers Natural Resource Conservation Service Division of Wildlife Air Pollution Office, Colorado Dept of Public Health and Environment National Park Service

16 Potential Environmental Impacts Short term impacts during construction: Increased noise and ambient air particles during construction Increased site traffic Impacts to storm water quality until the site is fully restored Long-term impacts: Increased storm water runoff volume due to development Loss of a limited amount of habitat, with impacts to native vegetation

17 Mitigation Measures Comply with all Building and Regulatory Permits including dust, erosion control, and protection of storm water quality The project has gone through significant Public Participation process to date to receive comments on location and aesthetics Distributed vegetation will be reestablished by the District The site has been designed with an open land concept to allow wildlife free movement through the area Regulatory Permits require proper protection of construction sites to limit dust, erosion, impacts to storm water quality and the off-site tracking of dirt

18 Question and Answer