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Ohio River Interceptor Structural Rehabilitation Heather Dodds , PE John Loechle, PE

Learn about the structural rehabilitation of the Ohio River Interceptor (ORI) by MSD, addressing project goals, challenges, and innovative solutions. Explore the historical significance, the design and construction process, and impactful partnerships in revitalizing downtown areas.

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Ohio River Interceptor Structural Rehabilitation Heather Dodds , PE John Loechle, PE

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  1. Ohio River Interceptor Structural RehabilitationHeather Dodds, PEJohn Loechle, PE 9/4/195 Cities Plus

  2. Agenda • MSD Background • What is the ORI? • ORI Assessment • Project Goals & Challenges • Project Solution • Design / Construction Process • Temporary Pump Station • Structural Rehabilitation • CSO Connections • Accomplishments and Takeaways

  3. MSD’s Background and History • Created in 1946 to provide wastewater service to Jefferson County • Over 3,300 miles of pipe in the separate and combined sewer systems • Operating budget $125 million/year (FY18) and 625 employees • Under an $850M Consent Decree Flood protection Stormwater and drainage

  4. What is the ORI? • Ohio River Interceptor (ORI) • 7-mile combined sewer • Varies in size 60-186” • Located underMain Street • 40% of MSD service area on a dry day • Constructed 1958-1960 within tunnel

  5. ORI Inspection Location ORI Inspection Limits

  6. ORI Repair Location ORI Repair  1,400 LF

  7. Project Goals Project Goals • Rehab Length of Sewer Required to Mitigate Public Risk • Maximize Long-Term Flow Capacity • Provide Best Value Solution for Community • Complete Repair by December 2018 • Add CSO Connections to Project • Minimize Impacts to Downtown Businesses • Minimize Vehicular and Pedestrian Impacts • Mitigate Noise and Odor, Minimize Emissions

  8. Project Challenges • Large service area • Dry weather flow – 30-40 MGD • Wet weather increases flow • No access on ORI between 4th and 15th • Pumparound required

  9. Project Challenges (cont.) • Main Street Business District • Downtown Events • Heavy Vehicular and Pedestrian Traffic • Web of existing underground utilities

  10. Public Partners • Emergency Operations Center • Mayor’s Office • Public Works • Louisville Downtown Partnership • Louisville Forward • KY Division of Water • KYTC / FHA • EPA Region 4 • Galt House • Humana • PNC Tower • Kentucky Center for the Arts • Muhammad Ali Center • Kentucky Science Center • Frazier Museum • Actor’s Theatre • Bristol • 21C • KET • And more………………

  11. Decision Matrix

  12. PVC Liner System Corrosion Resistant Semi-Rigid Flat Panels Mechanically Locked and Sealed with Joiner Strip Interstitial 5000 psi Grout with Reinforcing Steel Restores to Original

  13. Project Solution • Project Scope: ORI 4th to past 7th Street • ~1400 LF final length • Bulkhead ORI (Replaced Gate @ 4th Street) • Deployed External Pump Around System • Drained & Cleaned ORI • Full Structural Rehabilitation • Install Danby Panel Liner System • Connect CSOs at 5th, 6th, & 7th Streets

  14. Design / Construction Process

  15. Project Team • MSD • B&C (Local) • JTL (MBE / Local) • Heritage (Local) • USC • Boyer • Midwest Mole • Whipps • Thompson Pump (Local) • TEM (MBE / Local) • Lykins (WBE / Local) • Pace (Local) • CDI (WBE / Local) • DSI (Local) • T. Luckey • TRC (Local)

  16. Project Schedule

  17. ORI Rehabilitation Timeline – April-July 2018 • MSD optimized system for flow reduction • Obtained permits from KYTC, KDOW and Metro • Worked with utilities impacting construction • Designed ORI structural repair sections • Designed and constructed pump station, diversion weir structure, conveyance pipe system and traffic maintenance plan • Designed and began construction on 5th, 6th & 7th Street CSO connections • Mobilized rehabilitation contractor at 4th & Main

  18. Upstream Diversions

  19. Construction OperationsORI & 4th Street Pump Station

  20. Maintenance of Traffic • Vehicular, Pedestrian, and Bike considerations • Bus routes and access • Loading and garage access • Minimize business impacts

  21. Multiple Levels of Rehabilitation • Three Structural Repair Sections • 2 Cage • 1 Cage • No Rebar • Incorporates Danby Liner • Reduces original ORI ID (3"-5" crown and 3" side)

  22. Temporary Pumparound • Utility, ROW, and Traffic constraints • Impacts to multiple parcels, stakeholders, Ohio River Tunnel project • Designed as dry weather pump station at CSO location • Regulatory challenges • Operational challenges • Flood risk mitigation

  23. Temporary Pump Station Area – 4th & River

  24. Temporary Pump Station Area – 4th & River

  25. Piping Challenges

  26. Piping Challenges

  27. Piping Challenges

  28. Pumparound Success • Averaged 38 MGD • Active for 121 Days • 4.6 billion gallons pumped Click to add text

  29. Rehabilitation Work Area – 4th & Main

  30. Rehabilitation Work Area – 4th & Main ORI Access

  31. Rehabilitation Work Area – 4th & Main Job Trailer ORI Access

  32. ORI Rehabilitation Timeline – August 2018 • Constructed & tested pumparound • Continued construction on 5th, 6th & 7th Street CSO connections • Replaced existing gates and parts at 4th & Main • Began cleaning & rehabilitation

  33. Ohio River Interceptor Rehabilitation & Pumparound Rain Events – June 21-August 19

  34. Inspection – August 19

  35. Void Location Collapse and Void Estimated Void Limits Approx. 60 FT

  36. Field Investigation – August 20-22 • Observed pavement vibration, shifted traffic to the northernmost lane • Contacted LWC – high pressure main • Contacted LGE – electric transmission and gas • Verified MSD drainage assets intact, no other connections

  37. Hole Sealed with Urethane

  38. Urethane / Grout Injection

  39. Ring Beams & Lagging • Personnel Protection System (165 LF) • Every 2' o.c. with steel channels • Incorporated into permanent design

  40. Ring Beam & Lagging

  41. Curb Installation

  42. Liner Installation

  43. Tunnel Before / After

  44. Tunnel LinerCOMPLETE 12/7

  45. What All Went Through the Hatch? • 80 ring beams • 13.3 tons of reinforcing steel  • 4,500' of flow through pipe • 19,000 square feet of PVC liner • 500 CY of grout • 20 workers per day 2.5' x 9.5' opening

  46. CSO Connections • Original concept included open cut of damaged ORI sections • Minimize impacts to downtown • Provide access points

  47. CSO Connections • Shafts on side streets • Tunnel to ORI Shaft ORI Tunnel Tunnel ORI Shaft

  48. CSO Connections • Navigating around utilities

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