March 26, 2018

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main

Rehabilitation

Simon Lobdell, PEPatrick Stout, PE

Presentation Outline

Force main history Rehabilitation approach Construction issues Steam vs Water Inversion

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation2

Rogerson Drive Force Main – 30-inch Break

3 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch Break

First Look

4 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch DIP Repair

5 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Why did it happen there?

6 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch DIP Repair

7 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Proposed Rehabiliation

8 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Existing Conditions

9 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Elimination of 30-inch Mechanical Line Stop

10 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Elimination of 30-inch Mechanical Line Stop

Replaced line stop with tee/valve assembly

Reduced cost by eliminating line stop rental fee

Utilized existing parallel 16” FM to bypass flow

11 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Elimination of 30-inch Mechanical Line Stop

Plan for future connections Only applicable if Client

wants additional infrastructure

Short bypass may not warrant elimination of line stops

Utilize plug valves for wastewater to increase reliability

12 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

24-inch Mechanical Line Stop

13 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

24-inch Mechanical Line Stop

14 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

24-inch Mechanical Line Stop

15 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Existing 24” FM Drained

24-inch Temporary Bypass

16 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Parking Garage Road Ramp

17 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Parking Garage Road Ramp

Concrete Taper

4 mil PlasticPlywood SheatingUnder Concrete

18 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Parking Garage Road Ramp

19 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Parking Garage Ramp

20 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

ARV Structure

21 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

ARV Structure

22 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

ARV Structure

23 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Temp Odor Control / Pedestrian Ramp

24 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Temp Odor Control / Pedestrian Ramp

Temporary pedestrian ramp was utilized to manage pedestrian traffic over 24” bypass pipe

Utilized temporary ARV and carbon filter to manage odor in urban environment

25 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Traffic Control for School

26 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Traffic Control for School

27 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Pipe Replacement

Removal of old line stop concrete and ARV MH

Adding valves for future connections

Worked with OWASA touse PVC in lieu of DIP(OWASA standard)

28 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

CIPP Lining

29 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

CIPP Pre-liner

30 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

CIPP with Pre-liner Removed from Protecto 401 lined DIP

31 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

DIP interior pipe liners can melt and dilute resin during CIPP cure process

Ensure pre-liners are used to prevent diluting resin

Evidence of Protecto 401 lined DIP melting

30-inch CIPP

32 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch CIPP – 1st Liner

Uncured Liner Location

Infiltration Entering

33 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch CIPP – 1st Liner

34 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch CIPP – Partial 2nd Liner

35

Failure at Bend

Approx. Extents 2nd Partial Liner

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch CIPP – Partial 2nd Liner

36

Intermediate End Seal

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch CIPP – Completion 2nd Liner

37

Failure at Bend

Approx. Extents 2nd

Completion Liner

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch Completion 2nd Liner

38 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch 3rd Liner

Complete liner installed Installed using water inversion Removed intermediate end seal prior to lining Warranty for composite liner

39 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Advantages and Disadvantages Air Inversion and Steam CIPP Advantages

• Quicker Installation• Control Installation

(Steep Grades)

Disadvantages• Removal of Residual Water• Inversion Through Bends• Preventing Additional

Infiltration Entering

40 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Advantages and Disadvantages Water Inversion and Water Cure CIPP Advantages

• Removes residual water• Prevents additional

infiltration entering• More controlled inversion

through bends• Curing temperatures are

more regular

Disadvantages• Slower installation• Control installation

(steep grades)

41 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Patrick Stoutstoutwp@cdmsmith.com(919) 457-7002

Simon Lobdellslobdell@owasanc.onmicrosoft.com(919) 537-4247

Elimination of 30-inch Mechanical Line Stop

43 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Elimination of 30-inch Mechanical Line Stop

44 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

Temp ARV

45 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

46 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

30-inch CIPP Downstream Restraint

47 Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation

ARV Structure

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation48

30-inch CIPP – Partial 2nd Liner

49

Crack in Liner

Lessons Learned from OWASA’s Rogerson Drive 30-inch Force Main Rehabilitation