Attacking the Big Data Challenge: Integrating Collection System Flow Monitoring and Modeling into Financial Billing 2017 Michigan Section AWWA Annual Conference Mel Meng, Black & Veatch Chuck Schroeder, City of Grand Rapids, MI Ben Whitehead, Black & Veatch
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Attacking the Big Data Challenge: Integrating Collection System Flow Monitoring and Modeling into Financial Billing
2017 Michigan Section AWWA Annual Conference
Mel Meng, Black & VeatchChuck Schroeder, City of Grand Rapids, MI
Ben Whitehead, Black & Veatch
Agenda
• Annual Sewer Rate Update
• Customer Satisfaction
• Improve Billing Accuracy
• Challenges and Lessons
• Conclusions
• 1ST week of November distributed for customer
communities review
• Revise based on feedback
• Effective January 1st the following year
3
City of Grand Rapids Annual Sewer Rate Update
Wholesale Communities:• City of East Grand Rapids• Ada Township• Caledonia Township• Gaines Charter Township
Retail customers:• City of Grand Rapids• City of Walker• City of Kentwood• Cascade Charter Township• Grand Rapids Charter Township• Tallmadge Charter Township• Wright Township
• Matching cost record
• 151 Flow Segments
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S-9
S-3
S-1
S-6
S-4
S-5
S-7
S-8
S-2
S-60
S-44
S-43
S-94
S-17
S-11
S-77
S-52
S-21
S-22
S-81S-73
S-49
S-50S-35
S-23
S-9A
S-38
S-34
S-76
S-36
S-14S-13
S-45
S-27
S-95
S-59
S-37
S-71
S-97
S-15
S-44
S-66
S-25
S-41
S-12
S-54
S-74
S-40
S-26
S-89S-86
S-85
S-10
S-53
S-90
S-91
S-61
S-79
S-24
S-51S-58
S-18
S-33
S-46
S-55
S-19
S-56
S-16
S-20
S-47
S-63
S-88
S-72S-68
S-39
S-93
S-32
S-64
S-108S-126
S-12A
S-118
S-20A
S-101
S-135
S-129
S-133
S-112
S-128
S-134
S-106
S-111
S-125S-115
S-107
S-40A
S-13A
S-132
S-100
S-55B
S-120
S-105
S-22A
S-130
S-121
S-136
S-113
S-103
S-122
S-131
S-109
S-127
S-110
S-11A
S-108A
City of Grand Rapids
City of Walker
Cascade Township
Ada Township
City of Kentwood
Grand Rapids Township
Tallmadge Township
East Grand Rapids
Wright Township
City of Grand Rapids
ZonegatingFlow Segment: S-1Customer A: xx mgdCustomer B: xx mgdCustomer C: xx mgd…..
4
Zonegating Flow Segments Update
5
City of Grand Rapids Annual Sewer Rate Update
Annual Sewer Rate Update
Allocate cost based on Actual use of the pipes
Use = annual average flow
Total Spending: $100A: $100*25% = $25B: $100*75% = $75
Customer BAvg. Flow: 0.3 mgd
Customer AAvg. Flow: 0.1mgd
Total Spending: $100A: $100*100%=$100B: 0
Total Spending: $100A: 0B: $100*100%=$100
6
Customer loadings
haven’t been updated since
2003
• Customer loadings needed to be developed at 151 Flow Segments
• 37 Flow meters in 2003
7
Annual Sewer Rate Update
2016 Update
More than 100 Meters
Real-time Flow Monitoring Data
Since 2013
Augment Flow Data
All-pipe model calibrated under 2014 condition
developed in 2015
8
Why has my sewer rate increased more than my neighbors?
Concerned Customer
“
”
9
•What has changed from last year?
• It doesn’t look right:
• Is the service area correct?
•Did you use the best available data?
• Is the calculation correct?
10
What Matters to a Customer?
Customer Comments
We found things we overlooked in previous study
The City of Grand Rapids Wastewater Collection System • 127 mi2 Service Area• 11 Customer Communities