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CSO 034/035 Consolidation, Division B - Indianapolis, IN

This project included design of facilities to capture and consolidate two of the City's major combined sewer overflows, CSO 034 and 035. The project consists of three separate divisions. Division A included a 72-inch diameter sewer to intercept CSO 035 and bring it to the Division B tunnel project. Division C involved structural rehabilitation of a 36-inch diameter brick sewer located above the Division B tunnel alignment. These projects involved sewer model development, permit and utility coordination, public input and presentations, plan and specification preparation, and bidding assistance. Project highlights include:

  • 1,700 LF of 144-inch diameter sewer installed using tunneling methods
  • 30' diameter, 65' deep tunnel launch shaft
  • Two 22' diameter, 35' deep receiving shafts
  • 50' x 30' reinforced concrete upstream diversion structure at CSO 034
  • 50' x 40' reinforced concrete downstream dewatering structure
  • 105' x 35' reinforced concrete downstream weir structure
  • Duplex tunnel dewatering lift station
  • 750 LF of 8-inch diameter dewatering force main
  • 275 LF of 21-inch diameter sanitary sewer to divert CSO 136 to the tunnel
  • 20 LF of 24-inch diameter sanitary sewer to divert CSO 034A to the tunnel
  • Various storm sewer facilities

Awards

  • ACEC Indiana Engineering Excellence Honor Award - 2008
  • ACEC Indiana Civil Engineering Project of the Year - 2006

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