Farnsworth GROUP Rocky Mountain Section - American Water Works Association 2002 Joint Annual...

Rocky Mountain Section - American Water Works Association2002 Joint Annual Conference

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CONDITION ASSESSMENT of

Pinery Water and Wastewater District’s System

for

GASB 34/35 and CMOM


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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.


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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


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Vicinity

Map


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INTRODUCTION

• Pinery wants to more efficiently manage repairs, maintenance, and replacement of facilities due to upcoming regulations (GASB 34 & CMOM)


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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


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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


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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.


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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


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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


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Example of GIS Map

Example of Field Atlas


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Example of GIS Database


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Hydraulic Modeling


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Hydraulic Modeling

• Tool used to locate• bottlenecks• low pressure areas• functionally obsolete piping


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Software Evaluation

WaterCAD (proprietary software)

vs. EPANet (freeware)

EPANet chosen:• freeware• ArcView extension to extract *.inp files• water quality modeling


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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


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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


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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


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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


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Pressure Map - EPANet


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Pressure Map - GIS


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Asset Condition


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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


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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)


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Example of ECA GIS


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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


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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


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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:


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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


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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


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The Pinery will use the GIS maps for: locates any projects related to the system queries

CONCLUSION (cont’d)


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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


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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



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QUESTIONS?

Date post:	19-Dec-2015
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