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File #: 22-0483    Version: 1 Name: 4/4/22 Resolution to Approve Contract with Spence Brothers Headworks Improvement Project
Type: Resolution Status: Passed
File created: 4/4/2022 In control: City Council
On agenda: 4/4/2022 Final action: 4/4/2022
Enactment date: 4/4/2022 Enactment #: R-22-088
Title: Resolution to Approve a Contract with Spence Brothers to Construct the Headworks Improvement Project at the Wastewater Treatment Plant, ITB No. 4706 ($12,261,000.00)
Attachments: 1. Spence Bid.....pdf, 2. Spence Contract rev1.pdf
Title
Resolution to Approve a Contract with Spence Brothers to Construct the Headworks Improvement Project at the Wastewater Treatment Plant, ITB No. 4706 ($12,261,000.00)
Memorandum
Your approval is requested to approve a contract with Spence Brothers in the amount of $12,261,000.00 to construct the Headworks Improvement Project at the City's Wastewater Treatment Plant (WWTP).

The WWTP headworks systems provide initial treatment to remove debris (screenings) and grit from the water as the first stage of treatment, which prevents damage to downstream equipment and systems. The existing headworks consists of three mechanical bar screens, three screw compactors and two grit removal systems including pumps, swirl separator and grit washer. The bar screens were installed in 1989 and in 2000 and require frequent repair and rebuilding. The grit system was also installed in 2000 and has required pump replacement and rebuilding of the swirl concentrators and washers over time. In addition, WWTP staff have observed significant accumulation of grit downstream of the removal system that indicates the efficiency of the grit system is significantly diminished and negatively impacts downstream equipment and systems. The cost and frequency for maintenance of the headworks have increased and parts for the screening systems are no longer available and must be custom fabricated. These systems are nearing the end of their useful life and are in need of replacement to ensure effective screenings and grit removal.

The Headworks Improvement Project includes replacement of the bar screens, grit removal equipment, screening and grit processing equipment, and installation of odor control improvements for the headworks buildings. In response to ITB No. 4706, three bids to construct the Headworks Improvement Project were received and publicly opened on January 26, 2022. There were two screening options submitted for each bid. The bid prices were as follows:

Duperon Scr...

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