Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
CONDITION ASSESSMENT of
Pinery Water and Wastewater District’s System
for
GASB 34/35 and CMOM
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Pinery Water and Wastewater DistrictCharles J. Krogh, Paul Makowski, Kevin Clark
Presented by Farnsworth Group
Doug Barker, GIS Specialist
Ceila Rethamel, P.E.
Jim Pardy, P.E.
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
PINERY INFORMATION
• Pinery Water and Wastewater District - located south of Parker
• Staff with 20+ years of experience
• Facilities range in age from 30 years to brand new
• Primarily residential users with a golf course
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Vicinity
Map
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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INTRODUCTION
• Pinery wants to more efficiently manage repairs, maintenance, and replacement of facilities due to upcoming regulations (GASB 34 & CMOM)
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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INTRODUCTION (cont’d)
• Pinery has data and information in various sources• paper as-builts• CAD files• staff’s extensive knowledge• records: breaks, billing, metering
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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INTRODUCTION (cont’d)
Pinery hired Farnsworth Group to:• Compile data in central location• Complete hydraulic analysis• Develop condition assessment• Efficiently link different tools and software to
the database
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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TOPICS OF DISCUSSION
• Geographic Information System (GIS)• Doug Barker, GIS Specialist
• Hydraulic Modeling• Ceila Rethamel, P.E.
• Engineering Condition Assessment• Jim Pardy, P.E.
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Geographic Information System Uses
• Compile inventory of assets into digital format• Prepare data for hydraulic modeling software• Prepare data for condition assessment• Create 11x17 field atlas for staff use• Future use with billing and/or maintenance
software• Support GASB 34 and CMOM compliance
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Geographic Information System Benefits
• Efficient access to information• Hydraulic modeling set-up much easier• Condition assessment performed with our
existing GIS software• Excellent cartographic/presentation tool• Potential to link the GIS to other software
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Example of GIS Map
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Example of GIS Database
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Hydraulic Modeling
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Hydraulic Modeling
• Tool used to locate• bottlenecks• low pressure areas• functionally obsolete piping
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Software Evaluation
WaterCAD (proprietary software)
vs. EPANet (freeware)
EPANet chosen:• freeware• ArcView extension to extract *.inp files• water quality modeling
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Physical Model
• Coordinated data entry into GIS database to ensure information works for the physical model.
• Items left to add or check are:• directionality of PRVs and pumps
• tank data
• pump data
• controls
• demands
Converts to PRV or pump
Will not convert to a PRV or pump
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Demand Analysis
• Allowed more time for analysis of demands and usage
Diurnal Curve - Residential
0
2
4
6
8
10
12
14
16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Hour
Mu
ltip
lie
r
Peak Day
Ave Day
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Adding Pipe to the Model
• Fairly simple with GIS and EPANet
• Pipes have been added several times for proposed development
• Updated the background map
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Storing Hydraulic Results
• Store results in the GIS - track scenario• maps of pipe velocity or node pressure• tie pressures to addresses• use results in the condition assessment
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Pressure Map - EPANet
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Pressure Map - GIS
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Asset Condition
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Asset Condition
• Created asset condition standards and quality thresholds
• Prepared current condition assessment report• Create a Facility Condition Index• Asset Condition will help meet requirements
of GASB 34 and CMOM
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
Engineering Condition Assessment (ECA)
Score ValueFactors for ConditionAssessment forDistribution System
5 Points 4 Points 3 Points 2 Points 1 Point
Age >50Years
50-31Years
30-21Years
20-11Years
10-0Years
C-Value 0-49 50-69 70-89 90-99 >99Numbers of TimesRepaired
For each
Materials AC DIP PVCInstallation QualityMaterial Quality
1=Excellent Condition2=Good Condition3=Acceptable4=Unacceptable5=No Longer Serviceable
A score of: 5-14 - Adequate (Green)15-24 - Degraded (Yellow) >24 - Unsatisfactory (Red)
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Example of ECA GIS
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Facility Condition Index (FCI)
The FCI is commonly defined
DeficienciesFCI= -------------------------------------- Current Replacement Value
FCI<5% Good ConditionFCI 5%-10% Fair ConditionFCI>10% Poor Condition
objective tool used to track an element of infrastructure
general forecast of what type of reserves need to be available to maintain or improve
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Diameter(inch)
Lengthl.f
ReplacementCost/l.f.
ReplacementCost
4 1,554 $30 $46,6206 14,742 $40 $589,6808 6,850 $50 $342,500
12 1,357 $55 $74,635Total 24,503 ------ $1,053,435
Note: Replacement costs are only for example purposes.
Replacement Values and Deficiencies Values
Length of pipe from the GIS database Assign costs
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Replacement Values and Deficiencies Values (cont’d)
Adequate – reserve of 2% of the total replacement cost
Degraded –reserve of 20% of the total replacement cost
Unsatisfactory - reserve of 100% of the total replacement cost
Assign a percentage of the replacement cost to each of the ECA categories:
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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Replacement Values and Deficiencies Values (cont’d)
Deficiencies $102,162FCI= -------------------------------------- = --------------- = 10% Fair Conditions Current Replacement Value $1,053,435
Size(in)
Length(l.f.)
ReplacementCost/l.f.
ECA Rating RequiredReserves %
Reserves
8 1,363 $50 Unsatisfactory 100 $68,150
6 1,987 $40 Degraded 20 $15,896
4 1,554 $30 Adequate 2 $932
6 12,755 $40 Adequate 2 $10,204
8 5,487 $50 Adequate 2 $5,487
12 1,357 $55 Adequate 2 $1,493
Total $102,162
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
CONCLUSION
Farnsworth Group helped the Pinery develop new tools to manage repairs, maintenance,
and replacement of their facilities.
The tools included: GIS hydraulic model Engineering Condition Assessment and
Facility Condition Index
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
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The Pinery will use the GIS maps for: locates any projects related to the system queries
CONCLUSION (cont’d)
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
CONCLUSION (cont’d)
The Pinery will use the hydraulic model to: assist with new development decisions support their cases with developers assist with operation decisions
system flushing water quality issues
Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference
Farnsworth GROUP
The Pinery will use the ECA/FCI to: communicate to customers and board
members why reserve funds are needed how funds are going to be spent on various
projects
track conditions help meet requirements of GASB 34 and
CMOM
CONCLUSION (cont’d)
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