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I A19% <br />U <br />BRKIRON Report Number 14 -067 <br />the city that works !or you Agenda Section VI -4 <br />Council Meeting Date April 8, 2014 <br />REQUEST FOR COUNCIL CONSIDERATION <br />ITEM DESCRIPTION: CONSIDERATION OF PARTIAL PAYMENT 1 FOR PROJECT <br />14 -4, IRON /MANGANESE REMOVAL SYSTEM FILTER REHABILITATION — WTP #1. <br />DEPARTMENT HEAD'S APPROVAL: (ao4y <br />CITY MANAGER'S APPROVAL: ✓ / �oents No comments to supplement this report attached <br />Recommendation: To approve Partial Payment 1 in the amount of $57,475.00 for City Project 14 -4, <br />Iron /Manganese Removal System Filter Rehabilitation — WTP #1 to Rice Lake Construction Group. <br />Legislative History: <br />Council approved Plans and Specifications November 26, 2013 <br />Bids opened by Staff January 14, 2014 <br />Bid Awarded January 28, 2014 <br />Financial Impact: A review of the work completed and payment recommendation has been completed by Barr <br />Engineering. Please see attached payment breakdown for details. <br />During Work on filter vessel #4, it was determined that new underdrain nozzles, gravel retaining screens, and <br />inlet distributor piping (alternate bid items) will be required during rehabilitation. It is anticipated that these items <br />will be required for all vessels. <br />Many of the stainless steel studs used to hold the gravel retaining screen in place were damaged and need to be <br />replaced. The Contractor has provided a time and materials cost for replacement of these items. A future change <br />order will be processed for this additional work related to the stud replacement. <br />Explanation: This project consists of rehabilitating the four iron/manganese removal system filter vessels at <br />WTP #1. Project items include: <br />Site mobilization, temporary entrance, demobilization. <br />Remove filter media and gravel. <br />Filter vessel inlet pipe inspection. <br />4. Remove underdrain nozzles. <br />Prepare and re -coat filter interiors (includes surface preparation, stripe coat, primer and finish <br />coat(s). <br />6. Provide new underdrain nozzles. <br />7. Remove and provide new sample tap screens. <br />8. Provide new access manway gaskets. <br />9. Provide new gravel retaining screens. <br />10. Provide new gravel base and filter media. <br />11. Disinfect vessels and provide bacteriological testing. <br />12. ASME vessel recertification <br />13. Remove existing and provide new inlet distributor piping for all vessels. <br />14. Remove existing and provide new air wash distributor piping for all vessels. <br />