update on water systems operations
TRANSCRIPT
BEDFORD PUBLIC WORKS
UPDATE ON WATER SYSTEMS OPERATIONS
Board of SelectmenNovember 21, 2016
Agenda
• System Background• Water Quality• Water Quantity• Improvements• Issues• Questions
November 21, 2016
System Background
• Three municipal wells and MWRA supply• Serves approximately 4,500 customers through 92 miles of water mains
• Provides fire protection via over 800 fire hydrants
• Managed with three water standpipes (tanks) and three vaults
November 21, 2016
System Background
November 21, 2016
Water Quality
• System water is tested regularly• Test parameters
– pH and temperature (daily)– Fluoride (daily )– Chlorine residual (daily)– Total coliform (twice a month)– VOCs (quarterly)– Total trihalomethanes (quarterly)– Haloacetic acids (quarterly)– Lead (every three years)– Copper (every three years)
November 21, 2016
Water Quality
Year 2012 2013 2014 2015 2016
# of TC hits
164 66 34 4 7
• Total coliform hits 2012‐November 2016
• Contributing factors– Water temperature– Chlorine content– Water age
November 21, 2016
Water Quality
0
20
40
60
80
100
120
140
160
180
2008 2009 2010 2011 2012 2013 2014 2015 2016
TC Hits
Flushing/ Bleeding (MG)
Pipe Lining (100 LF)
• As pipe lining continues, TC hits as well as bleeding/ flushing needs have decreased
Water Quantity
• Up to 15% of Bedford’s water supply comes from the Shawsheen wells
• 85% comes from the MWRA through three connections with Lexington
• Average daily flow– Winter – 1.2 MGD– Summer – 2.4 MGD
November 21, 2016
Water Quantity
• Historic water usage
YearMetered Use
(MG)CEMU (MG) UAW (MG)
Finished Water (MG) CEMU % UAW %
2008 433.90 5.05 14.88 453.82 1.11% 3.28%
2009 415.05 4.85 44.10 464.00 1.05% 9.50%
2010 447.24 8.32 64.30 519.86 1.60% 12.37%
2011 400.05 7.21 86.80 494.06 1.46% 17.57%
2012 437.84 66.64 12.10 516.58 12.90% 2.34%
2013 442.41 49.99 9.50 501.90 9.96% 1.89%
2014 465.76 26.37 52.40 544.53 4.84% 9.62%
2015 482.75 14.20 35.50 532.45 2.67% 6.67%
November 21, 2016
Water Quantity
Below 25%
0%
20%
40%
60%
80%
100%Ja
n-48
Jan-
52
Jan-
56
Jan-
60
Jan-
64
Jan-
68
Jan-
72
Jan-
76
Jan-
80
Jan-
84
Jan-
88
Jan-
92
Jan-
96
Jan-
00
Jan-
04
Jan-
08
Jan-
12
Jan-
16
Qua
bbin
-Per
cent
Full
Normal
Below Normal
Drought Emergency Stage 3
Below 38% Drought Emergency Stage 2
Below ~55% Drought Emergency Stage 1
Warning
November 21, 2016
Municipal Use
0
500000
1000000
1500000
2000000
2500000
3000000
3500000
Feb‐08 Jul‐09 Nov‐10 Apr‐12 Aug‐13 Dec‐14 May‐16 Sep‐17
Mun. Total
DPW‐1
DPW‐2
Fire Station
Police Station
Library
B Field (Near Library)
High School‐1
High School‐2
Football Field
Town Hall
Middle School
J Field (JH Soccer)
Davis School
Davis School
Davis School
Lane School
Lane School
Bedford Common
November 21, 2016
Municipal Use
0
500000
1000000
1500000
2000000
2500000
3000000
3500000
Mun. Total
B Field
Town Hall
Lane Sch
Other Irr
Other Bldgs
Improvements
• Water main improvements (cleaning and lining)• Meter vault rehabilitation• Middlesex Turnpike main upgrade• Meter replacements• Tank painting/ refurbishments• Tank mixers• Well field cleaning• Gate valve exercising• Leak detection• SCADA upgrades
November 21, 2016
Issues
• Water quality– Total coliform/ chlorine residual
• Water quantity– Bleeder lines– Municipal use– Metering– Isolated pressure issues
November 21, 2016
Proposed Six‐Year Capital Plan
$183,600 $39,574 $39,305 $39,574 $0 $0$246,264
$3,865,498
$1,746,641
$305,735 $250,000
$1,706,000
$1,876,931
$2,125,531
$2,268,808
$2,466,905$2,154,951
$2,106,187$871,492
$318,064
$688,340
$910,734$351,647
$761,910$2,624,516
$834,559
$0
$789,480
$973,080
$800,000
$0
$1,000,000
$2,000,000
$3,000,000
$4,000,000
$5,000,000
$6,000,000
$7,000,000
$8,000,000
$9,000,000
FY 2018 FY 2019 FY 2020 FY 2021 FY 2022 FY 2023
Water
Veh/ Eq
Sewer
Highway
Grounds
Engineering
Agenda• Existing Project Update
• VFA Project Prioritization
• Project Questionnaires
• Proposed Six‐Year Capital Plan
• Questions
November 21, 2016
Questions?
November 21, 2016