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HomeMy WebLinkAbout05 - Dolphin Deep Water Well Rehabilitation — NOC and Acceptance of Contract No. 5633 (A) (CAP14-0037)CITY OF NEWPORT BEACH City Council Staff Report January 27, 2015 Agenda Item No. 5 TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL FROM: David A. Webb, Public Works Director- (949) 644 -3330, dawebb @newportbeachca.gov PREPARED BY: Andy Tran, Senior Civil Engineer PHONE: (949) 644 -3315 TITLE: Dolphin Deep Water Well Rehabilitation — Notice of Completion and Acceptance of Contract No. 5633 (A) (CAP14 -0037) ABSTRACT: On March 11, 2014, City Council awarded Contract No. 5633 (A) for the Dolphin Deep Water Well Rehabilitation project to General Pump Company for a total contract cost of $436,370.00 plus a contingency allowance of approximately 10 percent. The required work is now complete and staff requests City Council acceptance and close out of the contract. RECOMMENDATION: a) Accept the completed work and authorize the City Clerk to file a Notice of Completion; b) Authorize the City Clerk to release the Labor and Materials Bond 65 days after the Notice of Completion has been recorded in accordance with applicable portions of the Civil Code; and c) Release the Faithful Performance Bond one year after City Council acceptance. FUNDING REQUIREMENTS: Funds for the construction contract were expended from the following account: Account Description Water Enterprise Account Number 7524- C6002015 Total Construction Cost Amount $ 462,915.16 $ 462,915.16 5 -1 DISCUSSION: Overall Contract Cost/Time Summary A large percentage of the City's potable water supply is pumped from four existing groundwater wells in Fountain Valley, each owned and operated by the City of Newport Beach. To prevent potential failure of these critical water wells, they need to be monitored and rehabilitated regularly. This contract involved the rehabilitation of the City's Dolphin Deep Water Well at 9469 Dolphin Street, Fountain Valley. The work included the removal of the well pump and motor, wire brushing and air - jetting of the existing well casing, installation of a new well casing liner, installation of a temporary pump and motor, replacement of the well pump, and fabrication and installation of discharge piping. This contract has now been completed to the satisfaction of the Public Works Department. A summary of the contract cost is as follows: Original bid amount: $ 436,370.00 Actual cost of bid items constructed: $ 421,270.00 Contract change order: $ 41,645.16 Final contract cost: $ 462,915.16 The final overall construction cost was approximately 6.1 % over the original bid amount. This difference was primarily attributed to upsizing the well casing liner to maximize future water production, installation of a new well pump, fabrication of new discharge piping, and extended rental of the temporary pump and motor. The original contract allowed for 50 consecutive working days to complete the original scope of work. Due to the need for new discharge piping as required to adapt to the larger well casing liner, a significant amount of time was needed to fabricate the new parts. Staff recognized the need to operate this well as soon as possible in order to meet peak water demands during the summer season. As a result, a change order was approved to rent the temporary pump and motor for approximately four months. With the temporary pump and motor in operation, the City was able to produce water throughout the summer season and avoid the need to import water at a much higher cost. The contractor was allowed an additional 133 working days for temporary pumping and pipe fabrication. The project was substantially completed on November 26, 2014. A summary of the project schedule is as follows: Estimated Completion Date per March 2014 Schedule: August 1, 2014 Project Awarded for Construction: March 11, 2014 Completion Date per Contract and Approved Extensions: December 1, 2014 Actual Substantial Construction Completion Date: November 26, 2014 5 -2 Actual Awarded Contract Final Cost at Contingency % Due to % Due to Amount Completion Allowance Contract Directed Unforeseen Change Change Change $436,370.00 $462,915.16 Approx. 10% +6.1% 6.1% 0% Actual Time Allowed Contract Time (days) 183 -1 Under ( -) or Over ( +) A large percentage of the City's potable water supply is pumped from four existing groundwater wells in Fountain Valley, each owned and operated by the City of Newport Beach. To prevent potential failure of these critical water wells, they need to be monitored and rehabilitated regularly. This contract involved the rehabilitation of the City's Dolphin Deep Water Well at 9469 Dolphin Street, Fountain Valley. The work included the removal of the well pump and motor, wire brushing and air - jetting of the existing well casing, installation of a new well casing liner, installation of a temporary pump and motor, replacement of the well pump, and fabrication and installation of discharge piping. This contract has now been completed to the satisfaction of the Public Works Department. A summary of the contract cost is as follows: Original bid amount: $ 436,370.00 Actual cost of bid items constructed: $ 421,270.00 Contract change order: $ 41,645.16 Final contract cost: $ 462,915.16 The final overall construction cost was approximately 6.1 % over the original bid amount. This difference was primarily attributed to upsizing the well casing liner to maximize future water production, installation of a new well pump, fabrication of new discharge piping, and extended rental of the temporary pump and motor. The original contract allowed for 50 consecutive working days to complete the original scope of work. Due to the need for new discharge piping as required to adapt to the larger well casing liner, a significant amount of time was needed to fabricate the new parts. Staff recognized the need to operate this well as soon as possible in order to meet peak water demands during the summer season. As a result, a change order was approved to rent the temporary pump and motor for approximately four months. With the temporary pump and motor in operation, the City was able to produce water throughout the summer season and avoid the need to import water at a much higher cost. The contractor was allowed an additional 133 working days for temporary pumping and pipe fabrication. The project was substantially completed on November 26, 2014. A summary of the project schedule is as follows: Estimated Completion Date per March 2014 Schedule: August 1, 2014 Project Awarded for Construction: March 11, 2014 Completion Date per Contract and Approved Extensions: December 1, 2014 Actual Substantial Construction Completion Date: November 26, 2014 5 -2 ENVIRONMENTAL REVIEW: The project was determined to be exempt from the California Environmental Quality Act (CEQA) pursuant to Section 15302 Class 2 (c) of the CEQA Implementation Guidelines. This exemption covers repair of existing facilities involving negligible or no expansion of existing capacity. NOTICING: The agenda item has been noticed according to the Brown Act (72 hours in advance of the meeting at which the City Council considers the item). ATTACHMENTS: Description Attachment A - Location Mao 5 -3 ATTACHMENT A W SLa Mora Cir FjDur fWCir 1Ip�I _ � 11 LaCapillaAve I ! Ca�xta Park LaAJ 'm r3 _b LaTia Cir_. 1 �Yi� `J w `r' i SMnerCir La Luna Ave m 81? 133 ff ua — SarflshAveI -- _kve y '— f�olphm St. (n 3laricD -Ave � / ElPud*iAve / PROJECT LOCATION Load � d 9649 DOLPHIN AVE L FOUNTAIN VALLEY CA 92708 n unmy cti (f � Rvme CA rl II 2 II 'li 1-, I a.Arnop©4aRae DOLPHIN DEEP WATER WELL REHABILITATION • T I For, k F 1 T 'r La :4 CITY OF NEWPORT BEACH PUBLIC WORKS DEPARTMENT C -5633 (A) 1 01/27/2015 5 -4