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CITY COMMISSION AGENDA ITEM |
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Department: |
Municipal Services and Operations |
Commission Meeting Date: March 19, 2019 |
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Staff Contact: |
Nick Hoyt, Project Engineer |
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Recommendations/Options/Action Requested: |
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Award Bid No. B1907, Burrough’s Creek Trail Sanitary Sewer Interceptor Rehabilitation Project, to Visu-Sewer, Inc, in the amount of $673,383.15, as part of the 2019 Clay Pipe/Manhole Rehabilitation Program, CIP# UT9908. |
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Executive Summary: |
The scope of the project includes cured-in-place-pipe (CIPP) rehabilitation, root removal, and cleaning of approximately 5,800 linear feet of 24” Vitrified Clay Pipe (VCP) sanitary sewer interceptor along the Burrough’s Creek Trail from 23rd Street to 12th Street.
The sanitary sewer interceptors that parallel the Burrough’s Creek Trail are a vital component of the wastewater conveyance system to the Kansas River Wastewater Treatment Plant (WWTP). City staff observed surcharging along the 1960s era VCP interceptor for several days following the large October 2018 storm events. The extended period of surcharging indicated that the sewer was not functioning properly. In December 2018, City Staff was able to take advantage of flow diversion operations and upstream pump station shutdowns for a separate project to inspect key portions of the interceptor using CCTV technology. These inspections found large root masses and heavy debris restricting capacity and structural issues such as cracking and factures.
Restoring the capacity of the interceptor by cleaning and root removal is an urgent need in order to reduce the potential for sanitary sewer overflows (SSOs) and system backup during large storm events. City staff is not able to complete this work with current equipment due to the size of the pipe and density of the obstructions. The CIPP rehabilitation method will prevent future root intrusion, restore the pipe’s structural integrity and extend the design life of the existing infrastructure. If the pipe’s structural integrity continues to degrade to the point of collapse or failure, CIPP installation will not be possible without extensive excavation.
CIPP is a cost-effective trenchless construction method compared to other more invasive methods of sanitary sewer pipe installation. The structural strength and design life of CIPP is comparable to open trench construction at a fraction of the cost, disturbance, and installation time. The cost of 24-inch CIPP installation for this project is $97.75 per foot compared to the estimated cost of open trench sewer replacement of between $700 and $800 per foot.
Staff completed the construction documents and the project was advertised on January 18, 2019. Bids were opened on February 26, 2019 and read publicly aloud as follows:
Staff has reviewed the bids, qualifications, and current project commitments of the low bidder, Visu-Sewer, Inc. Staff recommends awarding the bid to Visu-Sewer, Inc in the amount of $673,383.15. |
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Strategic Plan Critical Success Factor |
Innovative Infrastructure and Asset Management Core Services Sound Fiscal Stewardship |
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Fiscal Impact (Amount/Source): |
Awarding the bid as recommended will have a fiscal impact of $673,383.15. Funding for this project comes from the 2018 revenue bond issue and the project is included in the Department of Utilities 2019 Capital Improvement Plan as Clay Pipe/Manhole Rehabilitation Program, CIP# UT9908. |
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Attachments: |
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(for CMO use only) |
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