Implementation of an Asset Management Software for Proactive Management and Optimization of the Collection System Rehabilitation and Renewal Program

Size: px

Start display at page:

Download "Implementation of an Asset Management Software for Proactive Management and Optimization of the Collection System Rehabilitation and Renewal Program"

Barnard Walker
5 years ago
Views:

1 Implementation of an Asset Management Software for Proactive Management and Optimization of the Collection System Rehabilitation and Renewal Program P. S. Arora, P.E. Joel Nickerson

2 2,591,286 linear feet 490 miles of mainline sewer (Denton to Kansas City) Replacement Cost $388,000,

3 3 3

4 4 4

5 Step by Step to Collection System Asset Management In 1990 s Denton implemented the ESRI GIS for Collection System assets In 1998 implemented PipeWorks that later on morphed into Cityworks CMMS Every activity of the Collections Department is recorded as a work order in Cityworks Cityworks now a great source of historical data on sewer system maintenance and repair

6 Step by Step to Collection System Asset Management In 1998 when implementing Impact Fees, Denton purchased the HydroWorks model to develop the collection system master plan. This was updated to InfoWorks in 2005 We maintain this model in-house Use InfoWorks Model for 5, 10 & 20 Year Collection system capacity needs modeling, CIP development, and assess impact of new developments

7 Hydraulic Model to Plan Capacity

8 100 Peak Flows Versus Peak Treatment Capacity 90 MILLION GALLONS PER DAY Pecan Creek WRP expansion South PFSB online West PFSB online 5 Year Storm Modeled Peak 2-Hour Flow 5 Year Storm Modeled Peak Day Flow Actual Peak Day Flow FISCAL YEAR

9 Step by Step to Collection System Asset Management In 2008 implemented the WERF SCRAPS (Sewer Cataloging, Retrieval, and Prioritization System) collection system prioritization model Evaluates each sewer segment for Probability of Failure Consequence of Failure Ranks pipeline segments by risk SCRAPS focuses inspection programs in areas most likely to need attention

10 Basin Cleaning Cycles

11 Current O&M Activities FROG 1, 5, 10 Year Sewer Line Cleaning Program Root Control CCTV Smoke Testing Private Lateral Defects Lift Station & Air Release Valve Maintenance Sewer Line Rehabilitation/ Replacement

12 How Does all of the O&M and Capacity Assurance stack up where it counts for regulatory agencies aka Overflows

13 Population vs Effluent Flow Trend 13

14 100 Main and Service Chokes Trend, 1997 to Present Service chokes per month and 12 month average Main chokes per month and 12 month average Jul Dec May Oct Mar Aug Jan Jun Nov Apr Sep Feb Jul Dec May Oct Mar Aug Jan Jun Nov Apr Sep Feb Jul Dec May Oct Mar Aug Jan Jun Nov Apr Sep Feb Jul

15 SSO Volume is Way Down SSO Volume (gal) 60,000,000 50,000,000 Annual Volume of SSOs Rainfall SSO Volume *100-year storm April 2007 Rainfall (in) ,000, ,000, ,000, ,000,

16 Still Working on SSO Counts SSO Count Annual Count of SSOs Rainfall SSO Count *100-year storm April 2007 Rainfall (in)

17 Collection System Assessment InfoWorks model a great tool to manage wet weather flows and reduction in overflows Contending with dry weather overflow FROG Expansive soils 45% Small-diameter clay pipes

18 Still Need to Manage Aging Pipes Old clay pipes choke, cause overflows for various reasons Investigating potential CIP is bottleneck Limited resources in manpower, equipment Evaluating and discussing take time and experienced personnel

19 Enter CapPlan Sewer CapPlan Sewer is a complete decision support, asset management, and capital planning tool for sewer systems CapPlan Sewer seamlessly integrates GIS information, CCTV video, PACP (Pipeline Assessment Certification Program) condition databases, hydraulic modeling, CMMS and other related information to help prioritize rehabilitation and replacement of sewer lines

20 Enter CapPlan Sewer Identifies individual repairs Evaluates necessity of repairs: major or minor? Compares that cost to full replacement cost Suggests a rehab method For every pipe!

21 CapPlan Sewer Design and use decision trees Decide on action for CCTV d pipes: repair, rehab, replace Decide on action without CCTV: based on pipe characteristics

22 Using a Decision Tree Anything with a yes/ no answer can go in a decision tree PACP observations Any pipe data: ex. age or choke rate Risk

23 CapPlan Decision Tree # 1

24 CapPlan Decision Tree # 1 Inspected: PACP Not Inspected: RISK

25 A Typical Pipe

26 CapPlan geocodes services

27 CapPlan locates maintenance issues settled deposits attached grease

28 CapPlan locates structural issues offset joint fracture

29 CapPlan fixes individual defects lining point repair

30 CapPlan Decision Tree # 1

31 CapPlan Tree #1 Suggested Rehab

32 Staff Data Qualification We checked the default decision tree against decisions we had already made CapPlan matched fairly well Confidence in results is critical

33 Staff Buy-In is Critical

34 CapPlan is Customizable We want to tackle dry-weather overflows We decided to tailor CapPlan to pipes with choke history and small clay pipes Our tree suggests rehab without CCTV

35 CapPlan Decision Tree #3 1

36 CapPlan Decision Tree #3 Inspected: PACP Not Inspected: PERFORMANCE 1

37 CapPlan Decision Tree #3 1 2

38 CapPlan Tree #3 Suggested Rehab

39 CapPlan Tree #3 Suggested Rehab Rehab Segments Total Cost Replace and Investigate Area 97 $4,978,853 Replace No CCTV Priority 2 48 $835,496 Replace No CCTV Priority 1 9 $374,974 Defect Repair 25 $62,484 Defect Repair And Full Lining 4 $56,996 Replace 8 $271,570 CCTV Priority 1 41 $19,658 CCTV Priority 2 9 $3,734 CCTV Priority 3 23 $9,324 CCTV Priority $172,945 CCTV Priority $46,050 Grand Total 860 $6,832,085

40 Questions??

COMPARISON OF FIXED & VARIABLE RATES (25 YEARS) CHARTERED BANK ADMINISTERED INTEREST RATES - PRIME BUSINESS*

COMPARISON OF FIXED & VARIABLE RATES (25 YEARS) Fixed Rates Variable Rates FIXED RATES OF THE PAST 25 YEARS AVERAGE RESIDENTIAL MORTGAGE LENDING RATE - 5 YEAR* (Per cent) Year Jan Feb Mar Apr May Jun Jul