A New Strategic Asset Management Tool for Simulating Water Utilities long-term Sustainability

Transcription

1 A New Strategic Asset Management Tool for Simulating Water Utilities long-term Sustainability Amin Ganjidoost/Dr. Rashid Rehan/Dr. Mark Knight/Dr. Andre Unger/Dr. Carl Haas University of Waterloo, Canada TRENCHLESS TECHNOLOGY ROADSHOW May 28-29, 2014 Scotiabank Convention Centre, Niagara Falls, ON

2 Todays presentation Scope: Present summary of on-going work related to the modeling the long-term financial sustainability of The Cities A, B & C watermain and sanitary sewer networks Objective: Strategic-level model to enable water rate-setting, and planning of watermain and sanitary sewer operational and capital works over the life-cycle of the infrastructure (10 to 100 year planning horizon) Outcome: meet infrastructure service and financial performance indicators revenues equal expenses comply with provincial legislation(s) 2

3 Outline 1. Watermain network 2. Sanitary sewer network 3

4 Length of pipes (km) Watermain inventory City of A City of B City of C Cast Iron PVC km of pipes which serve 120,000 consumers Age groups of pipes (year) 501 km of pipes which serve 130,000 consumers Max Fee Hike Rate (% per annum) ThinCI DI CI PVC A B C Pay as you go Borrowing Capital reserving AC DI CI PVC 450 km of pipes which serve 83,000 consumers

5 Controls on Watermain Scenarios Scenario rehabilitation rate (% of network/yr) debt capacity (as % of revenue) reserve level (as % of network replacement value) Capital reserving The most efficient management strategy with lower cumulative total expenditures and maximum fraction of 75+ year pipes max. acceptable 75+ year fraction (%) elimination period for 75+ year pipes 5 5 years 5

6 Financial and Performance Metrics A B C 6

7 Revenue A B C 7

8 Expenses A B C 8

9 Affordability A B C 9

10 Summary of Watermain Scenarios Comparison Metric Capital reserving A B C cumulative expenditures (constant $) $479 million $532 million $462 million 100 year average network age (years) year average frac on of 75+ year pipes 0.67% 0.37% 0.29% 100 year maximum frac on of 75+ year pipes 5.48% 8.18% 3.12% peak fee hike rate 8.48 %/yr 8.5 %/yr 9.25 %/yr average fee hike rate 6.55 %/yr 6.85 %/yr 7.47 %/yr 10

11 Summary of Watermain Expenditures Comparison Metric Cumulative life cycle costs (constant million $) Capital reserving A B C Cumulative operational expenditures (constant million $) Cumulative capital expenditures (constant million $) Cumulative interest expenditures (constant million $)

12 Outline 1. Watermain network 2. Sanitary sewer network 12

13 Length of pipes (km) Sanitary Sewer Inventory City of A City of B City of C PVC Concrete Vitrified Clay km of pipes which serve 120,000 consumers AC PVC Concrete Vitrified Clay Internal Condition Grade of Pipes 503 km of pipes which serve 130,000 consumers AC PVC Concrete Vitrified Clay km of pipes which serve 83,000 consumers Max Fee Hike Rate (% per annum) A B C Pay as you go Borrowing Capital reserving

14 Controls on Sanitary Sewer Scenarios Scenario rehabilitation rate (% of network/yr) rehabilitation rate of ICG4 pipe debt capacity (as % of revenue) reserve level (% of network replacement value) Borrowing 1.3 allowed The most efficient management strategy with lower cumulative total expenditures and fraction of pipes in ICG 5 max. acceptable deteriorated fraction (%) 10 borrowing rate spread: 1.5% per annum 14

15 Financial and Performance Metrics A B C 15

16 Revenue A B C 16

17 Expenses A B C 17

18 Summary of Sanitary Sewer Scenarios Comparison Metric cumulative expenditures (constant $) Borrowing A B C $221 million $291 million $200 million 100 year average network ICG year average frac on of ICG5 pipes (% of network length) 1.72% 0.47% 1.32% 100 year maximum frac on of ICG5 pipes 8.04% 6.13% 9.18% peak fee hike rate 6.25 %/yr 6.3 %/yr 6.75 %/yr average fee hike rate 5.48 %/yr 5.65 %/yr 6.46 %/yr maximum actual debt service ratio

19 Summary of Sanitary Sewer Expenditures Comparison Metric Cumulative life cycle costs (constant million $) Cumulative operational expenditures (constant million $) Cumulative capital expenditures (constant million $) Borrowing A B C Cumulative interest expenditures (constant million $)

20 Conclusion Watermain Networks: Capital reserving management strategy has the highest financial and service performance levels. Sanitary Sewer Networks: Borrowing management strategy has the highest financial and service performance levels. The Next Step: Join watermain and sanitary sewer networks Develop linkages between strategic, tactical and operational decision levels reliability and criticality Industry foundation classes 20

21 Thank You! 21