sallal water association wsp pp summary 5-5-20...2020/05/05 · 6725$*( 5(48,5(' 6wrudjh...
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SALLAL WATER ASSOCIATIONWATER SYSTEM PLAN
PRESENTATION 5/5/20
• CURRENT SYSTEM
• POPULATION PLANNING PROJECTIONS - ERU
• NORTH BEND ECONOMIC DEVELOPMENT
• NORTH BEND WASTEWATER FACILITIES PLAN
• PUGET SOUND REGIONAL COUNCIL
• WATER QUALITY
• HYDRAULICS – LIMITS – WATER RIGHTS, SYSTEM
• WATER USE EFFICIENCY
• OPERATION & MAINTENANCE
• CAPITAL IMPROVEMENT PLAN
• FINANCES
1DRAFT
SERVICE AREA TOPOGRAPHY
2
RETAIL SERVICE AREA
DRAFT
CURRENT SYSTEM• ADJACENT PURVEYORS – WILDERNESS RIM, RIVERBEND, NB.
• A FEW GRP A – NOR WEST, TRUCKTOWN, GOLF COURSE
• MANY GRP B
• TOPOGRAPHIC RELIEF IS SIGNIFICANT
• 1,664 CONNECTIONS (END OF 2018)
• 2 OF THE CONNECTIONS ARE MASTER METERS FOR WILDERNESS RIM SERVING 623
HOMES AND 3 LOW USE COMMERCIAL CONNECTIONS (PARK, FIRE & COMM CTR)
3DRAFT
CURRENT SYSTEM
SOURCES RATTLESNAKE WELLS
EDGEWICK WELL
STORAGE RATTLESNAKE & UPLANDS
EDGEWICK & MIDDLEFORK
RIVERPOINT TERRELL
BOOSTER STATIONS TANNER LOWER MT. SI RIVERPOINT
PRVS 24 STATIONS
WATER MAIN 56 MILES – ABOUT ½ IS 8-INCH
4DRAFT
MAJOR FACILITIES
5DRAFT
POLICIES
6
• WHOLESALE/WHEELING – CONSIDER ON CASE BY CASE BASIS• ANNEXATIONS – NOT BEING CONSIDERED• DESIGN STANDARDS – STANDARDS HAVE BEEN ADOPTED BY SALLAL• LATECOMER AGREEMENTS – WILL BE CONSIDERED CASE-BY-CASE BASIS• CROSS CONNECTION – ADOPTED POLICY 1998• GROWTH PAYS FOR GROWTH• TIMELY & REASONABLE
DRAFT
POLICIES
7
• TIMELY –• WRITTEN RESPONSE TO CWA APPLICATION WITHIN 14 DAYS.
• ISSUE OR DENY AN APPLICATION FOR CWA IN 120 DAYS.
• REASONABLE –
• CONSISTENT WITH ASSOCIATION RULES, AS AMENDED IN 2019.
• INFRASTRUCTURE EXTENSION (RULE 16)
• CITY/COUNTY REVIEW OF PROPOSAL FOR LAND USE COMPLIANCE (RULE 40)
• SUFFICIENT WATER AVAILABLE (RULE 40)
PLANNING DATA
• POPULATION
• CURRENT
• FUTURE
• GROWTH RATE
• WATER DEMAND
• EQUIVALENT RESIDENTIAL UNITS (ERU)
8DRAFT
HISTORICAL POPULATION
Year Sallal Service Connections
Wilderness Rim Service
Connections
Population served
Sallal Only Total
2010 1,490 625 4,165 5,688
2011 1,498 625 4,213 5,736
2012 1,519 625 4,280 5,803
2013 1,563 625 4,389 5,912
2014 1,575 625 4,571 6,094
2015 1,587 625 4,620 6,143
2016 1,601 626 4,716 6,241
2017 1,645 626 4,743 6,268
2018 1,664 626 4,830 6,356
9
Population - Data from Office of Financial Management – Small Area Estimates Program
DRAFT
PRODUCTIONANNUAL WATER RIGHT LIMIT 696 AC-FT/YR
YearTotal Production
(gal)Average Daily
Production (gal)AC-FT/YR MG/YR
2010 164,823,438 451,571 505.9 164.8
2011 143,179,266 392,272 439.4 143.2
2012 156,065,689 426,409 479.0 156.1
2013 166,326,611 455,689 510.5 166.3
2014 158,981,685 435,566 487.9 159.0
2015 172,445,648 472,454 529.3 172.5
2016 160,957,595 439,775 494.0 161.0
2017 173,300,800 474,797 531.9 173.3
2018 179,691,400 492,305 551.5 179.7
10DRAFT
DISTRIBUTION SYSTEM LEAKAGE
YEARDSL
(GAL)PERCENT
UNMETERED3-YEAR ROLLING
AVERAGE
2012 3,317,963 2.13% 6.35%
2013 8,733,581 5.25% 5.43%
2014 7,102,006 4.47% 3.95%
2015 4,719,730 2.74% 4.15%
2016 11,748,507 7.30% 4.83%
2017 14,674,862 8.47% 6.17%
2018 15,808,003 8.80% 8.19%
11DRAFT
Wilderness Rim is excluded from the values above. The amount sold to WR is subtracted from both the amount produced and the amount sold/authorized, then DSL is calculated.
MAX DAY PEAKING FACTORDate
MDD (MGD)
MDD (GPM)
ADD (MGD)
Peak Factor
8/3/2009 1.36 946 0.50 2.727/23/2010 1.01 698 0.45 2.238/19/2011 0.99 685 0.39 2.538/16/2012 0.93 644 0.43 2.177/6/2013 1.36 945 0.46 2.987/4/2014 1.24 861 0.44 2.848/4/2015 1.45 1,006 0.47 3.078/15/2016 1.09 757 0.44 2.478/2/2017 1.05 729 0.46 2.267/29/2018 1.08 749 0.43 2.49
Average 2.58Median 2.51
3rd Quartile 2.81Ave & Std Dev 2.89
12DRAFT
EQUIVALENT RESIDENTIAL UNITS
YearSallal Residential
Consumption (gal)
Residential Connections
Sallal Consumption/
ERU
WR Consumption
All Res ERU Average
2010 98,878,771 1,441 188 40,759,492
2011 84,736,626 1,448 160 34,842,139
2012 102,932,347 1,468 192 38,106,636 184
2013 104,800,373 1,510 190 41,059,066 187
2014 106,893,583 1,522 192 36,603,530 183
2015 119,223,742 1,534 213 36,439,964 197
2016 106,682,311 1,547 188 32,604,333 175
2017 118,230,900 1,591 204 27,030,745 179
2018 117,984,710 1,608 201 29,145,506 180
AVERAGE (2012-2018) 198 184
13DRAFT
TOTAL NUMBER OF ERU
14
RESIDENTIAL WILDERNESS RIM
COMMERCIAL IRRIGATION OTHER 1 DSL TOTAL
2010 1,441 625 107 68 193 2,433
2011 1,448 625 121 64 218 2,476
2012 1,468 625 105 62 47 2,307
2013 1,510 625 107 62 126 2,430
2014 1,522 625 97 22 101 2,367
2015 1,534 625 91 64 61 2,375
2016 1,547 626 111 33 171 2,487
2017 1,591 626 94 53 33 198 2,594
2018 1,608 626 81 73 75 216 2,678
DRAFT
1 – Other – predominately flushing it was included in DSL prior to 2017
ERUS AND PRODUCTION
15
2,000
2,100
2,200
2,300
2,400
2,500
2,600
2,700
2,800
140
150
160
170
180
190
200
210
220
2012 2013 2014 2015 2016 2017 2018
TOTA
L ER
U
Prod
uctio
n (M
G/Y
R)
Annual Production MG Total ERU
Water Right = 696 ac-ft/yr =226.8 MG/YR
PROJECTED NUMBER OF ERU
Year Sallal ERU 1 WR ERU DSL ERU 2 Total ERU
2018 1,836 626 215 2,678
2019 1,947 626 195 2,767
2020 2,032 626 203 2,861
2021 2,093 626 188 2,908
2022 2,133 626 171 2,929
2023 2,168 626 173 2,967
2024 2,203 626 176 3,005
2028 2,341 626 187 3,154
2033 2,508 626 201 3,335
2038 2,665 626 213 3,504
2040 2,727 626 218 3,572
16
Assumptions:Growth in County & UGA 0.3%/yr PSRC, (not incl WR)Growth in City: Economic Profile Report 2018 – 2021
(Wastewater Facility Plan 2022 – 2038)
City Growth Rate
Sallal Combined Growth Rate
(Consump ERU)
2018 12 % 2.73%
2019 15 % 4.48%
2020 10 % 3.32%
2021 5 % 2.30%
2022 3.24 % 1.45%
2025 2.95 % 1.23%
2028 2.66 % 1.17 %
2030 2.47 % 1.12 %
2038-40 1.94 % 0.96 %
DRAFT
1 – ERU from 2018 data projected at growth rate2 – DSL observed in 2018, increasing to 12% in 2019 then decreasing until 2022 to 8%. 8% thereafter assumed3 – red text: B y itself Sallal has insufficient water rights to serve these additional ERU
PROJECTED WATER PRODUCTIONYear
Number of ERUs 1
Annual Production
(MG/YR)
Maximum Day Production
(gpm)
2016 * 2,520 161.0 881
2017 * 2,590 173.3 914
2018 * 2,678 179.7 881
2019 2,767 186.3 913
2020 2,861 193.1 946
2021 2,908 196.5 963
2022 2,929 198.0 971
2023 2,967 200.7 984
2024 3,005 203.5 997
2028 3,154 214.3 1,050
2033 3,335 227.0 1,114
2038 3,504 239.5 1,174
42040 3,572 244.4 1,198
17
Water Right LimitAnnual = 226.8 MG/YRInstantaneous = 1,691 gpm
* Actual
DRAFT
1 – INCLUDES WILDERNESS RIM, DSL AND OTHER
WATER QUALITY
WATER QUALITY – TOOK A HIT RECENTLY
• MEETING ALL WATER QUALITY REGULATIONS (EXCEPT FOR RECENT COLIFORM)
• BACTERIOLOGICAL POSITIVE TESTS SEPTEMBER 2019
• WATER IS NOW DISINFECTED WITH CHLORINE – IF SALLAL REMAINS A CHLORINATED SYSTEM WILL DEPEND UPON SEVERAL FACTORS.
• FUTURE WATER QUALITY
• BEST MANAGEMENT PRACTICES
• DESIRE OF SALLAL MEMBERS & BOARD
• INORGANIC CONSTITUENTS ARE LOW
• LEAD & COPPER MEET ALL REGULATIONS
• NON-DETECT FOR PFAS – WELL 3
18DRAFT
RECOMMENDED/REQUIRED SYSTEM MINIMUM
Required Recommended Meets standards
Source
Meet MDD with all sources and storage
Meet max day with 18 hours of pumping.
Yes – with Well 4
Meet Ave Day Demand with largest source out of service
Yes – with Well 4
Pump Stations Redundant Power Yes
Storage
Provide operational equalizing, standby and fire suppression storage
Same Yes – with new Reservoir2nd new reservoir needed in a few years, size depends upon NB contract, if/when/what
Distribution
30 psi min Peak Hour Same Yes
20 psi fire flow @ 1,000 gpm (or more for specific locations)
Same Some water mains needed to get to 20 psi at 1,000 gpm
19DRAFT
BOOSTER STATIONS
• MUST MEET MAXIMUM DAY CAPACITY IF THEY PUMP TO A RESERVOIR.
• MUST MEET FIRE FLOW OR PEAK HOUR DEMAND (WHICHEVER IS GREATER) IF THEY PUMP TO A “CLOSED” ZONE.
• ALL BOOSTER STATIONS MEET MINIMUM CRITERIA
20DRAFT
STORAGE
ASSUMPTION - EACH OF THE RESERVOIR ZONES ARE STAND ALONE.
• 710 ZONE AND ALL ZONES SOUTH TO RATTLESNAKE ARE ON UPLANDS/RATTLESNAKE
RESERVOIRS
• 793, 883 AND 920 (ALL ZONES EAST OF TANNER) EDGEWICK/MIDDLEFORK
RESERVOIRS
• 840 ZONE RIVER POINT
• 1009 ZONE TERRELL
21DRAFT
STORAGE COMPONENTS
22DRAFT
STORAGE REQUIRED - 2040
Storage ComponentRattlesnake/
UplandsEdgewick/
Middle ForkRiver Point Terrell
Operational Storage (OS)
29,200 45,200 8,000 8,000
Equalizing Storage (ES)
14,000 52,000 16,000 16,000
Standby Storage (SB) 563,000 116,000 35,000 35,000
Fire Suppression Storage (FSS)
300,000 360,000 120,000 120,000
Total Required Live Storage
606,200 457,200 144,000 144,000
Storage Volume 591,000 850,000 158,000 157,000
Dead Storage 90,000 135,000 8,000 8,000
Total Effective Storage 500,600 715,000 150,000 149,000
Storage Surplus (105,600) 257,800 6,000 5,000
23
Current storage deficit eliminated with the new reservoir.
Timing of additional 3rd
Rattlesnake Reservoir is rate of growth dependent. Whether or not there is a contract with North Bend will impact the size of a future reservoir.
DRAFT
DISTRIBUTION SYSTEM
24
Generally water system provides fire flow at 1,000 gpm. Area south of Trucktown and by River Point provide 500 gpm at 20 psi (County Min).
DRAFT
25DRAFT
"THERE ARE TWO TYPES OF FORECASTS ... LUCKY OR WRONG!!!!”
CONTROL MAGAZINE
MAXIMUM DAY DEMAND
0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
2015 2020 2025 2030 2035 2040
GPM
SOURCE LIMIT
26
PHYSICAL CAPACITY (WITH WELL 4) EXCEEDS WATER RIGHTS LIMIT OF 1,600 GPM AT RATTLESNAKE WELLS.
WELL 3 WATER RIGHT = 91 GPMWELL 3 CAPACITY = 80 GPM, ASSUME WELL 3 FOR 18 HOURS –60 GPMSOURCE LIMIT = 1,660 GPM
DRAFT
ANNUAL WATER DEMAND PROJECTIONS
150
160
170
180
190
200
210
220
230
240
250
2015 2020 2025 2030 2035 2040
MG
/YR
PROJECTED DEMAND ANNUAL WATER RIGHT
27
• PROJECTED DEMAND - BASED UPON GROWTH PROJECTIONS PREVIOUSLY PRESENTED.
• NO INCREASED WATER USE EFFICIENCY/REDUCTION IN WATER USE PER ERU ASSUMED.
• DSL at 8%.
DRAFT
WATER USE EFFICIENCY
• DATA COLLECTION REQUIREMENTS – OK
• SUBMITTAL OF WUE REPORTS – OK
• METERING – OK
• DISTRIBUTION SYSTEM LEAKAGE (3 YR ROLLING
AVERAGE) – MEETS STATE STANDARDS (10%),
BUT COULD BE BETTER
• DSL GOAL – 7%
28
0%
2%
4%
6%
8%
10%
12%
2011 2013 2015 2017 2019
DSL
DRAFT
3-YR DSL ROLLING AVERAGE
SALLAL CUSTOMER DEMAND
40
50
60
70
80
90
100
160
170
180
190
200
210
220
2012 2013 2014 2015 2016 2017 2018
GP
D/P
ER
SO
N
GP
D/E
RU
GPD/ERU GPD/PERSON
Sallal population per household has increased from
2.9 to 3.0 over this period.
29DRAFT
OTHER PURVEYORS GPD/ERU
30
GPD/ERU GPD/Person Source Data Year
Ames Lake 148 53 2018 WSP 2012 - 2016
Bothell 180 74 2012 WSP 2009
Carnation 172 59 2010 WSP 2008
North Bend 149 63Draft WSP
2020 2014-2019
Northshore 114 72Draft WSP
2018 2011 – 2013
Sallal 198 66Draft WSP
2020 2012-2018Seattle Public
Utilities 175 Data Set 2017
Snoqualmie 197 95 2013 WSP
Samm Plateau 213 2018 WSP 2014 – 2016USGS – King
County 82 2015
DRAFT
GOAL SETTING• SINCE 2012 SALLAL CONSUMPTION PER HAS INCREASED ABOUT 1 GPD/ERU/YR
• GOAL – DECREASE CONSUMPTION BY 0.5 GPD/ERU/YEAR
• GOAL – REDUCE MAX DAY AND SUMMER DEMAND PEAK RELATIVE TO AVERAGE DAY, FROM 2.58 TO 2.50
• REDUCE FLUSHING – THIS HAS DECREASED WITH SYSTEM BECOMING CHLORINATED
• METHODS TO LOWER PRODUCTION
• EDUCATION – CONSUMPTION ERU
• GET DSL BACK TO 7%
• LEAK DETECTION
• MONTHLY REVIEW OF CONSUMPTION DATA AND PRODUCITON DATA
• WR MASTER METER CALIBRATION
• INSTALL METERS AT ALL BOOSTER STATIONS TO BETTER UNDERSTAND WATER DEMAND PER RESERVOIR ZONE
• CONNECT ALL METERS TO SCADA TO ENABLE “REAL TIME” ASSESSMENT OF WATER MOVEMENT IN SYSTEM AND IDENTIFICATION OF POTENTIAL LEAKS.
• CONSERVATION PRICING
• A POTENTIAL OPTION
31DRAFT
WATER PRODUCTION WITH AND WITHOUT WUE
150
160
170
180
190
200
210
220
230
240
250
2016 2018 2020 2022 2024 2026 2028 2030 2032 2034 2036 2038
Ann
ual p
rod
uctio
n (M
G/Y
R)
Prod w/WUE Series2 Water Right
SALLAL CONNECTED ERU2,502 2,601
WATER RIGHT226.8 MG/YR
Note:ERU VALUES DO NOT INCLUDE WILDERNESS RIM OR ERU ATTRIBUTABLE TO DSL
32DRAFT
SOURCE PROTECTION
• WELLS 1, 2 & 4 IN SPU WATERSHED – WATER COMES FROM LEAKAGE
THROUGH MASONRY DAM. CEDAR MORAINE.
• WELL 3 – SNOQUALMIE VALLEY AQUIFER. EAST OF TRUCKTOWN.
33DRAFT
O&M
• COLIFORM SAMPLING - ONCE/MONTH 7 SAMPLES
• CHLORINE RESIDUAL – DAILY
• LEAD & COPPER – 3 YR
• DISINFECTION BY PRODUCTS
• EMERGENCY RESPONSE – TERRELL AND E.COLI LESSONS LEARNED
• LEAK INSPECTION PROGRAM
• LEAK REPAIR
• CROSS CONNECTION PROGRAM – ANNUAL RENEWAL
• METER READING
• CONSTRUCTION INSPECTION
34DRAFT
CAPITAL PROJECTS DRAFT LIST
Capital Project Location Type YearW/out NB,
2018 DollarsWith NB,
2018 Dollars1 Chlorine (Disinfection) Systems Each Well Disinfection 2019 $300,000 $300,0002 Water System Plan Planning 2019 $65,000 $65,000 3 Office/Warehouse Facilities - Design Edgewick Permits 2019 $625,000 $625,000
4 CT Water Main Well 2 Water Main 2020 $215,000 $215,000
5 North Bend Contract (Prof Serv) North Bend GFC 2020 $0 $30,000
6 436th at NB Way RAB NB Way Water Main 2019 $200,000 $200,000
7 436th at SE 136th St 436th Ave SE Water Main 2019 $206,000 $206,000
8 Well 4 Equipping (New Rattlesnake Well) Rattlesnake Well 2020 $1,034,000 $1,034,000
9 Rattlesnake Reservoir No. 2 Rattlesnake Ridge Storage 2020 $1,066,000 $1,066,000
10 Flow Meter at Tanner BPS Tanner Meter 2020 $35,000 $35,000
11 Connection between NB/SWA - design North Bend BPS & WM 2020 $0 $84,000
12 Office/Warehouse Facilities - Construction Edgewick Construction 2020 $4,115,000 $4,115,000
13 Flow Meter & SCADA at Lower Mt. Si BPS Lower Mt. Si SCADA 2021 $40,000 $40,000
14 Replace Trucks Various Vehicles 2021 $50,000 $50,000 15 Connection between NB/SWA North Bend BPS & WM 2022 $0 $758,000 16 Flow Meter & SCADA at RP BPSi River Pt SCADA 2022 $40,000 $40,000 17 VFD Well 2 Rattlesnake Well 2022 $65,000 $65,000 18 Tanner Road - 436th to Sallal Office Tanner Road Water Main 2022 $702,000 $780,00019 Small Track Hoe with Trailer Various Equipment 2023 $30,000 $30,000 20 Rattlesnake Reservoir No. 3 Rattlesnake Ridge Storage 2024 $959,000 $1,990,000 21 Sampling Stations (3) Various Distribution 3-year Budget $45,000 $45,000 22 Annual Meter Replacement Various Distribution 10-year Budget $300,000 $300,000 23 PRV Station upgrades Various Distribution 5-year Budget $125,000 $125,00024 Edgewick Road 468th Ave SE Distribution 2025 $1,395,000 $1,395,000 25 Cascade East Water Main 793 zone Distribution 2026 $257,000 $257,000 26 Terrell Water Main Mt Si Rd Distribution 2027 $572,000 $572,000 27 Watermain Replacement - Budget Various Distribution 4-year Budget $600,000 $600,000
$13,041,000 $15,022,00035DRAFT
• Sample Stations$15,000/yr – 3 years
• Meter Replacement$30,000/yr every year
• PRV Station Upgrades$25,000/yr – 5 years
• Watermain replacement$150,000/yr – 4 yrs
FINANCIAL ASSUMPTIONS End of 2018
Reserves($ Thousands)
Operations $798
Capital $885
Amortization $282
36
General Assumptions
COLA 3.0%
Interest on Balance
1.0%
Taxes 5.0%
Insurance 5.0%
Inflation 3.0%
Inf & Growth varies
Loan Rate 5.0%
Rates & Amortization
Year Percent Increase -Rates
Year Percent Increase -Amortization
20202021
8%8%
2020 mid-year2021
30%3%
2022 - 2025 5% 2022 0%
2026 - 2030 2% 2024 - 2025 4%
DRAFT
FINANCIAL ACCOUNT SUMMARY
37
OPERATIONAL (CHECKING) SUMMARY CAPITAL SUMMARY AMORTIZATION
Beginning Balance Beginning Balance Beginning Balance
Retail & Base Revenue Connection Charges & Interest Inc. Amortization Revenue
Wilderness Rim Revenue Transfer from Operations Total Debt Annual Payment
All other Revenue Total New Loan Funds End of Year Balance
Total Operating Revenues Total Capital Expenses
Water Distribution Expense Net Capital Revenue
General Administration Expense End of Year Balance (Capital)
Net Operational Revenue
End of Year Balance (Operations)
DRAFT
SALLAL ESTIMATED FINANCIAL RESERVES
38
DRAFT
39