Are You Ready for the Next Big Storm?

1. Are You Ready for the Next Big Storm? Case Study: CMOM Program in the City of Novi, MI Tim Sikma City of Novi Michelle LaRose, P.E. Orchard, Hiltz & McCliment, Inc.

2. Introduction – Are you Ready? • Sewer systems have some degree of inflow and infiltration • Under some rainfall condition, the system capacity will be exceeded • Do you know how big of a storm it will take? • Will it cause SSOs, or worse, will it flood basements? • Is there capacity left for growth?

3. City of Novi, Michigan • 2006 population of 52,023 • One of the largest retail areas in Michigan • Approximately 60% developed • 42% population growth in the 1990s • Population growth to nearly 70,000 people projected in the next 25 years Oakland County Novi

4. The City of Novi Asks Questions: • Do they have capacity for the growth projected? • How wet is the system? • How big of a storm will exceed their capacity? • What is most cost effective process to manage the sewer system? These questions prompted the CMOM Study (Capacity, Management, Operation and Maintenance)

5. Objectives of the CMOM • Provide confidence in current state of system • Ensure adequate capacity for future needs • Meet customer and EPA / MDNRE expectations • Seek O&M efficiencies • Become proactive – not reactive

6. The Process

7. CMOM Implementation • Three phase approach with transition to City • Phase I • Flow projections • Wet weather flow analysis • Capacity assessment

8. CMOM Implementation (cont.) • Phase III • SSES • Ongoing metering • Pilot rehab • Phase II • SSES • Pump station inventory • Ongoing metering • Next step – Transition!! Novi OHM

9. The Transition Goals • All work done in-house • Cost-savings • Need a champion to lead • Workload balance • Becoming part of the routine

10. Where shall we begin?

11. Overall Strategy • Ongoing metering & SSES within Area G Occurring simultaneously • Meter next high priority district (Area B) • Rehab in Area G based on SSES results

12. Getting Started • Establish schedule • Allocate staff

13. Implementation • Area G SSES • Manhole inspections – GPS integration • Smoke testing – notification, equipment, etc. • Sewer televising – bid proposal, PACP, review • Area B Metering • Select meter locations • Schedule for data download/review

14. Implementation (cont.) • SSES in the next high priority district (Area B) Occurring simultaneously • Start metering in Area C1 • Rehab recommendations in Area B based on SSES results

15. SSES Findings

16. SSES Findings (cont.)

17. SSES Findings (cont.)

18. SSES Findings (cont.)

19. Results • SSES identified rehab needs in Areas G and B • Metering identified SSES needs in Area C1 (investigation is in progress) • Next steps: • Continue SSES in Area C1, high priority sub-areas • Rehabilitation in Area G, B, and C1; post-rehab metering to follow • Begin sub-district metering in Area C2

20. Challenges • Staffing balance • Other DPW activities • Staying on schedule • Skill set/training • Meters • Own vs. rent • Selecting locations

21. Challenges (cont.) • Budgeting • Internal Coordination • Expect the Unexpected

22. Challenges (cont.) Keeping Staff Happy!

23. Why We’ve Been Successful • Overcoming the challenges • Phased approach • One person to champion the program • Maximize existing resources • More control over planning and budget • Flexibility and willingness to learn And most of all… TEAM EFFORT!!!

24. Questions? Michelle LaRose, P.E. Water Resource Engineer OHM michelle.larose@ohm-advisors.com (734) 466-4411 Tim Sikma Water and Sewer Manager City of Novi, MI tsikma@cityofnovi.org (248) 735-5647 Special Thanks to the rest of the CMOM Team: Scott Roselle, City of Novi Brian Coburn, City of Novi Robert Czachorski, OHM