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Jordan Creek Culvert Repair

Learn about the characteristics, construction team, project purpose, key elements, hurdles, timing, and takeaways of the Jordan Creek Culvert Repair Project in Juneau, Alaska. Includes information on sliplining, CMP culverts, flow control, and construction challenges.

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Jordan Creek Culvert Repair

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  1. Brian Gastrock P.E. Successful Sliplining of a 96-inch Diameter Culvert in Juneau, Alaska Jordan Creek Culvert Repair

  2. Project Characteristics • Change Order to Runway Safety Area Improvement Project • 96-inch CMP Culvert Under Taxiway Alpha • Conveys Jordan Creek • Tidal Influence • Slipline with 84-inch CAP • 120-feet, Centered Under Taxiway • Flow Control of Jordan Creek • 15 to 20 CFS, w/ 2-year storm of 80 CFS

  3. Construction Team • Alaska Interstate Construction LLC, Prime Contractor • Stephl Engineering LLC, Subcontractor/Engineer • Contech Engineered Solutions • Pipe Supplier • Mobile Concrete and Grout of Alaska, Subcontractor • Pacific International Grout, Subcontractor

  4. Project area Photo courtesy of Google earth

  5. Project area Photo courtesy of Google earth

  6. Project Purpose & Conditions • Severe Corrosion in Existing 96-inch CMP Culvert

  7. Project Purpose & Conditions • Complete Design and Construction in 2012 • May to August • Permit Stipulations, Anadromous Stream • Short-term Repair • 120-feet of the 220-feet Culvert Under Taxiway • 84-inch CAP Chosen • Short Lead Time • Structural Capacity • Corrosion Resistance

  8. Construction Key Elements • Field Visit to Determine Pipe Capable of Sliplining

  9. Construction Key Elements • Bypass Jordan Creek

  10. Construction Key Elements • Tidal Influence

  11. Construction Key Elements • Clean and Prepare the 96-inch CMP for Sliplining • 3-feet of Gravel and Soils in Invert • 50 CY of Material • Baffles to Remove • Water-stop Grout to Reduce Infiltration

  12. Pipe Cleaning • 3-feet of Soils and Gravel, Along with Baffles

  13. Pipe Cleaning • Cleaning Equipment

  14. Pipe Cleaning • Injection Grout to Reduce Infiltration

  15. Construction Key Elements • Pipe Delivery

  16. Construction Key Elements • Inflatable Plug to Hold Back Tides

  17. Construction Key Elements • Pipe Insertion Photo courtesy of AIC

  18. Construction Key Elements • Construct Bulkheads

  19. Construction Key Elements • Internal Joint Bands

  20. Construction Key Elements • Annular Space Grouting • Low Density Grout, 60 PCF • 3 Lifts

  21. Construction Key Elements • Annular Space Grouting

  22. Construction Hurdles • 2nd Grout Lift Separated Pipe from Grout

  23. Construction Hurdles • Rain Exceeded Bypass Pump Capacity

  24. Construction - Timing • Cleaning – 2 weeks • Baffles, Tides, Confined Space • Injection Grouting • Insert Pipe – 1 to 2 days • Prep for Grouting – 3 to 4 days • Bulkheads • Internal Bands • Grouting – 3 to 4 days • 1 Day for Each Lift

  25. Takeaways • Verify Host Pipe • Each Project is Unique • Blanket Specifications – Risky and Expensive • Flexibility During Construction • Cleaning • Annular Space Grouting • Bypass

  26. QUESTIONS? Brian Gastrock P.E. Jordan Creek Culvert Repair

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