6/22/2018 Wastew ater Rates and Charges Citizens Advisory Committee Wastew ater Rates and Charges Citizens Advisory Committee June 21, 2018 June 21, 2018 Why are we here? INTRODUCTIONS “Because we need your help!” Larry Brown, Chair Board of Trustees 1
6/22/2018 Cities and Unincorporated Clark County 2
6/22/2018 ENVIRONMENT & RATEPAYERS TRUSTEES PLANT COLLECTION ENGINEERING/ CUSTOMER FINANCE/ IT ADMINISTRATION OPERATIONS/ SYSTEM DEVELOPMENT CARE MAINTENANCE 3
6/22/2018 COLLECTION SYSTEM • 230 square mile service area • 2,190 miles • 46,298 manholes COLLECTION SYSTEM • 23 lift stations 2,190 Miles of Pipeline • 2,160 miles gravity pipeline • 30 miles force main • 8” to 84” in diameter • 1,880 Miles - Small Diameter (<15”) • 214 Miles - Medium Diameter (15” to 30”) • 96 Miles - Large Diameter (>30”) 4
6/22/2018 1000 42% over 30 years old 903.8 900 800 700 • Poly Vinyl Chloride (PVC) 600 Miles • Vitrified Clay Pipe (VCP) 500 366.3 400 • High Density Polyethylene (HDPE) 300 245.9 216 181.5 200 • Centrifugally Cast Fiberglass 147.8 98.1 100 Reinforced (CCFR) 0 Age • Lined Concrete 0‐5 Years 5‐10 Years 10‐15 Years 15‐20 Years 20‐25 Years 25‐30 Years 30+ years Lift stations pump wastewater to a higher elevation Manhole Base Manhole Cone Manhole Cover 5
6/22/2018 1600 1425.4 1400 • 25 Chemical • 4 Gas Phase 1200 66% PVC Injection Facilities 28% VCP 1000 Facilities • 400-10,000 cfm Miles 800 • 2,000 Gallons LIQUID PHASE Air Scrubbers 593.8 600 per Day 400 200 62.5 41.5 31.4 4.9 0 Poly Vinyl Chloride (PVC) Vitrified Clay Pipe (VCP) High Density Polyethylene (HDPE) Centrifugally Cast Fiberglass Reinforced (CCFR) Lined Concrete Other COLLECTION SYSTEM MAINTENANCE • 24/7 Customer Response • 148 Located at 4 Lift Stations • Staffed 10/7 • Charcoal and • After Hours Stand-by Persnickety Response 6
6/22/2018 COLLECTION SYSTEM MAINTENANCE • Sewer Pipeline Repairs • System-wide • Manhole Inspections • Open-cut Cleaning and • Flow Monitoring • Trenchless Inspections • Manhole Repair and • Odor Monitoring Replacement • Hot-Spot Cleaning • Sanitary Sewer Overflow Response COLLECTION SYSTEM MAINTENANCE 30 • Source Control Program 70 70 (Pretreatment) 27 25 60 • USA Mark-out/Call Before 50 You Dig 20 48% Complaints • Public Education 40 Reduction SSOs 15 30 12 10 20 96% Reduction 5 10 3 0 0 2006 2017 2006 2017 7
6/22/2018 • Chemicals • Electricity • Microbes • People • Facilities • Equipment TREATMENT • Raw Materials: Influent Reclaimed Water Factory • Stormwater • Wastewater discharged from: • Urban Run-off • Residences (toilets/sinks/showers/washing machines) • Hotels/Restaurants • Businesses/Industries 8
6/22/2018 5% 95% Reclaimed Water Factory Las Vegas Wash Direct reuse Outputs Treatment Basics • Liquid 2012 2017 Current Treatment (mgd) (mgd) Capacity (mgd) • Solids Flamingo Water Resource Center 94 105 126 Treatment Laughlin Water Resource Center 1.9 2.1 8.0 • Odor Control Desert Breeze Water Resource Center 2.9 2.5 4.9 Moapa Valley Treatment Facility 0.15 0.16 0.75 Indian Springs Treatment Facility 0.07 0.10 0.50 Searchlight Ponds 0.05 0.04 0.09 Blue Diamond Ponds 0.013 0.011 0.044 9
6/22/2018 • Physical Treatment • Physical and Chemical Treatment • Bar Screen • Ferric Chloride • Grit Basin • Primary Clarifiers • Biological Treatment • Physical and Chemical • Aeration Treatment Basins/Activated Sludge • Aluminum Sulfate • Biological Nutrient • Sand/Anthracite Filters Removal • Membranes • Secondary Clarifiers 10
6/22/2018 • Dissolved Organics • Microorganisms • Suspended Solids • Fats/Oil/Grease/Grit • Phosphorus • Toxins • Ammonia • Trace Organics • Physical or Chemical Treatment • Ultraviolet light • Ozone FLAMINGO WATER RESOURCE CENTER • Physical and Chemical Treatment • Thickening • Polymers • Centrifuges 11
6/22/2018 • Helpers Clean Water for Us • Testing and Analysis • Chemical Scrubbers • Biofilters LeAnna’s Famous Bug Show! LeAnna’s Famous Bug Show ! 12
6/22/2018 Quality Laboratory • Permit Compliance • Data for Process Control • Monitor Receiving Waters LABORATORY • 15 Scientists and Technicians • 14,400 Samples/Year • 108,000 Tests/Year 13
6/22/2018 Discharge Permits • Driven by Water Quality Standards for Receiving Waters • Each Facility • Sampling • Reporting Air Quality Permits • Dust Permits • Operating Permits Stormw ater • 5 Facilities Permits • Daily Visual Checks • Weekly/Monthly Monitoring • Quarterly Sampling • Annual Reporting 14
6/22/2018 Water Care Cycle EVAPORATION, CONDENSATION CONSUMPTION AND PRECIPITATION Water in the Colorado River Water from Pacific Ocean provides irrigation and evaporates and creates clouds. The drinking water to the Colorado clouds drop rain and snow over the River states. Colorado River Rockies. Snow melts in the water flows into Lake Mead, western Rocky Mountains and runs providing drinking water and off into the Colorado River. recreation for Southern Nevada. REUSE CARE The reclaimed water flows After using the water, it flows to through the Las Vegas one of the wastewater treatment Wash back to Lake Mead. facilities in Southern Nevada, is highly treated for safe return to the environment. ENERGY DRIVERS STORMWATER POTABLE WATER RECLAIMED WATER 15
6/22/2018 $5.5M Annual Electric Bill • FWRC: $120/MG BIG ELECTRICAL USERS Compared to Home Equipment • DBWRC: $400/MG • Blowers • Typical Pool Pump=1 HP (.75kW) PO POWER WER • LWRC: $600/MG • Pumps • Typical Home AC Unit=4kW • MVTF: $1,000/MG • 250 HP Centrifuges (190kW) INFLUENT IN NT TREATMENT REQUIRES POWER Water Conservation • Indoor “conservation” • Outdoor conservation 16
6/22/2018 Concentrations/Loads Over Time Water Conservation Percent Increase 2010-2018 30% Gallons Per Capita per Day (GPCD) 25% 26% 26% Use 2002 2017 Decrease 20% 21% Total 314 233 26% Percent 15% Returned 116 106 9% 14% 10% 10% 10% Consumptive 198 127* 36% 5% 6% * Goal is 116 GPCD by 2035 0% Flow Total Suspended Biological Oxygen Total Phosphorus Solids Demand Concentrations (mg/L) Loads (lbs/day) City of Henderson 13% Total Diversions for Colorado River 500 Total: 470 450 227 400 City of Las Nevada’s CCWRD 55% Vegas 23% 350 Allotment=300 1000 acre-feet 300 250 243 200 150 100 50 City of North Las Vegas 9% 0 2017 City of Henderson City of Las Vegas City of North Las Vegas CCWRD Consumptive Use Return Flow Credit 17
6/22/2018 MEETING WRAP UP 2017 100 90 Million Gallons a Day 80 70 60 50 40 30 20 10 0 City of Henderson City of Las Vegas City of North Las CCWRD Vegas LV Wash Direct Reuse Next Meeting: July 19 at the Las Vegas Metro Chamber of Commerce Conference Room 575 Symphony Park Avenue Suite 100 Flamingo Water Resource Center Tours • O&M and • Annual Sewer Service • Friday, June 22 at 7AM Replacement Charge • Friday, June 29 at 7AM • Capital Projects • Reserve Policy • Rate Structure • Connection Fee 18
6/22/2018 Next Meeting: July 19 at 11:30 AM CONTACTS at the Las Vegas Metro Chamber of Commerce Terry Murphy Conference Room tmurphy951@gmail.com 575 Symphony Park 702-683-8550 Avenue Suite 100 Guy Hobbs • O&M and Replacement guy@hobbsong.com 702-733-7223 • Capital Projects • Rate Structure Julie Chadburn • Connection Fee jchadburn@cleanwaterteam.com • Annual Sewer Service Charge 702-668-8068 • Reserve Policy 19
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