[PDF] - 6/22/2018 Wastew ater Rates and Charges Citizens Advisory PDF Document

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Wastew ater Rates and Charges Citizens Advisory Committee June 21, 2018

INTRODUCTIONS

Why are we here? “Because we need your help!” Larry Brown, Chair Board of Trustees

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Cities and Unincorporated Clark County

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ENVIRONMENT & RATEPAYERS TRUSTEES COLLECTION SYSTEM PLANT OPERATIONS/ MAINTENANCE ENGINEERING/ DEVELOPMENT CUSTOMER CARE FINANCE/ IT ADMINISTRATION

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COLLECTION SYSTEM

230 square mile service area
2,190 miles
46,298 manholes
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”)

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181.5 147.8 366.3 216 245.9 98.1 903.8 100 200 300 400 500 600 700 800 900 1000 Miles Age 0‐5 Years 5‐10 Years 10‐15 Years 15‐20 Years 20‐25 Years 25‐30 Years 30+ years

42% over 30 years old

Poly Vinyl Chloride (PVC)
Vitrified Clay Pipe (VCP)
High Density Polyethylene (HDPE)
Centrifugally Cast Fiberglass

Reinforced (CCFR)

Lined Concrete

Manhole Base Manhole Cone Manhole Cover

Lift stations pump wastewater to a higher elevation

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1425.4 593.8 31.4 4.9 62.5 41.5

200 400 600 800 1000 1200 1400 1600 Miles

Poly Vinyl Chloride (PVC) Vitrified Clay Pipe (VCP) High Density Polyethylene (HDPE) Centrifugally Cast Fiberglass Reinforced (CCFR) Lined Concrete Other

66% PVC 28% VCP

LIQUID PHASE

25 Chemical

Injection Facilities

2,000 Gallons

per Day

4 Gas Phase

Facilities

400-10,000 cfm

Air Scrubbers

Located at 4 Lift Stations

148
Charcoal and

Persnickety

COLLECTION SYSTEM MAINTENANCE

24/7 Customer Response
Staffed 10/7
After Hours Stand-by

Response

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System-wide

Cleaning and Inspections

Hot-Spot Cleaning
Sanitary Sewer

Overflow Response

Manhole Inspections
Flow Monitoring
Odor Monitoring

COLLECTION SYSTEM MAINTENANCE

Sewer Pipeline Repairs
Open-cut
Trenchless
Manhole Repair and

Replacement

COLLECTION SYSTEM MAINTENANCE

Source Control Program

(Pretreatment)

USA Mark-out/Call Before

You Dig

Public Education

27 12 5 10 15 20 25 30

Complaints 2006 2017 48% Reduction

70 3 10 20 30 40 50 60 70

SSOs 2006 2017 96% Reduction

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TREATMENT

Raw

Materials: Influent

People
Facilities
Equipment
Chemicals
Electricity
Microbes

Reclaimed Water Factory

Wastewater discharged from:
Residences (toilets/sinks/showers/washing machines)
Hotels/Restaurants
Businesses/Industries
Stormwater
Urban Run-off

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Reclaimed Water Factory

Outputs

95% 5%

Las Vegas Wash Direct reuse 2012 (mgd) 2017 (mgd) Current Capacity (mgd) Flamingo Water Resource Center 94 105 126 Laughlin Water Resource Center 1.9 2.1 8.0 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

Liquid

Treatment

Solids

Treatment

Odor Control

Treatment Basics

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Physical Treatment
Bar Screen
Grit Basin
Physical and Chemical

Treatment

Ferric Chloride
Primary Clarifiers
Biological Treatment
Aeration

Basins/Activated Sludge

Biological Nutrient

Removal

Secondary Clarifiers
Physical and Chemical

Treatment

Aluminum Sulfate
Sand/Anthracite Filters
Membranes

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Physical or Chemical

Treatment

Ultraviolet light
Ozone
Dissolved Organics
Suspended Solids
Phosphorus
Ammonia
Microorganisms
Fats/Oil/Grease/Grit
Toxins
Trace Organics
Physical and Chemical

Treatment

Thickening
Polymers
Centrifuges

FLAMINGO WATER RESOURCE CENTER

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Chemical

Scrubbers

Biofilters
Helpers Clean Water for Us
Testing and Analysis

LeAnna’s Famous Bug Show ! LeAnna’s Famous Bug Show!

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Quality Laboratory

Permit

Compliance

Data for Process

Control

Monitor

Receiving Waters LABORATORY

15 Scientists

and Technicians

14,400

Samples/Year

108,000

Tests/Year

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Discharge Permits

Driven by Water

Quality Standards for Receiving Waters

Each Facility
Sampling
Reporting

Stormw ater Permits

Air Quality Permits

Dust Permits
Operating Permits
5 Facilities
Daily Visual Checks
Weekly/Monthly Monitoring
Quarterly Sampling
Annual Reporting

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Water Care Cycle

EVAPORATION, CONDENSATION AND PRECIPITATION

Water from Pacific Ocean evaporates and creates clouds. The clouds drop rain and snow over the

Rockies. Snow melts in the

western Rocky Mountains and runs

ff into the Colorado River.

CONSUMPTION

Water in the Colorado River provides irrigation and drinking water to the Colorado River states. Colorado River water flows into Lake Mead, providing drinking water and recreation for Southern Nevada.

REUSE

The reclaimed water flows through the Las Vegas Wash back to Lake Mead.

CARE

After using the water, it flows to

ne of the wastewater treatment

facilities in Southern Nevada, is highly treated for safe return to the environment. STORMWATER POTABLE WATER RECLAIMED WATER

ENERGY DRIVERS

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TREATMENT REQUIRES POWER

IN INFLUENT NT PO POWER WER

$5.5M Annual Electric Bill

FWRC: $120/MG
DBWRC: $400/MG
LWRC: $600/MG
MVTF: $1,000/MG

BIG ELECTRICAL USERS

Blowers
Pumps
250 HP Centrifuges (190kW)

Compared to Home Equipment

Typical Pool Pump=1 HP (.75kW)
Typical Home AC Unit=4kW

Water Conservation

Indoor “conservation”
Outdoor conservation

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Water Conservation

Use 2002 2017 Decrease Total 314 233 26% Returned 116 106 9% Consumptive 198 127* 36% Gallons Per Capita per Day (GPCD) * Goal is 116 GPCD by 2035

Concentrations/Loads Over Time

6% 10% 10% 14% 21% 26% 26%

0% 5% 10% 15% 20% 25% 30%

Flow Total Suspended Solids Biological Oxygen Demand Total Phosphorus Percent

Percent Increase 2010-2018

Concentrations (mg/L) Loads (lbs/day) City of Henderson 13% City of Las Vegas 23% City of North Las Vegas 9% CCWRD 55% City of Henderson City of Las Vegas City of North Las Vegas CCWRD 243 227

50 100 150 200 250 300 350 400 450 500

2017 1000 acre-feet

Total Diversions for Colorado River

Consumptive Use Return Flow Credit Total: 470

Nevada’s Allotment=300

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10 20 30 40 50 60 70 80 90 100

City of Henderson City of Las Vegas City of North Las Vegas CCWRD

Million Gallons a Day

2017

LV Wash Direct Reuse

MEETING WRAP UP

Flamingo Water Resource Center Tours

Friday, June 22 at 7AM
Friday, June 29 at 7AM
O&M and

Replacement

Capital Projects
Rate Structure
Connection Fee
Annual Sewer Service

Charge

Reserve Policy

Next Meeting: July 19 at the Las Vegas Metro Chamber of Commerce Conference Room 575 Symphony Park Avenue Suite 100

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Next Meeting:

July 19 at 11:30 AM at the Las Vegas Metro Chamber of Commerce Conference Room 575 Symphony Park Avenue Suite 100

O&M and Replacement
Capital Projects
Rate Structure
Connection Fee
Annual Sewer Service Charge
Reserve Policy