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Home My WebLink About04 - Dolphin and Tamura Shallow Water Well Rehabilitations - NOC for Contract No. 5981 (Project No. 15W11)PR CITY OF T - z NEWPORT BEACH City Council Staff Report July 26, 2016 Agenda Item No. 4 TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL FROM: David A. Webb, Public Works Director - 949-644-3311, dawebb@newportbeachca.gov PREPARED BY: Ben Davis, Associate Civil Engineer, bdavis@newportbeachca.gov PHONE: 949-644-3317 TITLE: Dolphin and Tamura Shallow Water Well Rehabilitations - Notice of Completion for Contract No. 5981 (Project No. 15W11) ABSTRACT: On July 14, 2015, City Council awarded Contract No. 5981 (15W11), Water Well Rehabilitation — Dolphin and Tamura Shallow Wells project, to General Pump Company for a total contract cost of $276,280.00 with a $55,200.00 allowance for contingencies. The required work to rehabilitate these two shallow water wells is now complete and staff requests City Council acceptance and contract close out. RECOMMENDATION: a) Accept the completed work and authorize the City Clerk to file a Notice of Completion for the project (At the July 14, 2015 meeting, this project was found to be exempt from the California Environmental Quality Act (CEQA) pursuant to Section 15302); 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 the acceptance by the City Council. FUNDING REQUIREMENTS: Funds for the construction contract were expensed from the following account: Account Description Water Enterprise Account Number 70101-980000-15W04 Total: Amount $ 234,554.99 $ 234,554.99 4-1 Water Well Rehabilitation — Dolphin and Tamura Shallow Water Wells Notice of Completion for Contract No. 5981 (CAP15-0022, Project No. 15W11) July 26, 2016 Page 2 DISCUSSION: Overall Contract Cost/Time Summary Awarded Final Cost at Contingency Actual % Due to % Due to Contract Amount Completion Allowance Contract Directed Unforeseen Change Change Change $276,280.00 $234,554.99 20% or less -15.1% -21.9% 6.8% Allowed Contract Time + 130 Actual Time 0 Approved Extensions days) = Under (-) or Over (+) The contract has now been completed to the satisfaction of the Public Works Department. A summary of the construction cost is as follows: Original bid amount: Actual Cost of Bid Items Constructed: Total Change Orders: Final contract cost: $276,280.00 $206,900.00 $ 27,654.99 $234,554.99 The City owns and operates two well sites located in the City of Fountain Valley. The first well site is located on Dolphin Avenue and the second is adjacent to Tamura Elementary school and the well sites are named respectively. Each well site has a deep and shallow well that tap into different aquifers. These four wells provide about 75 percent of the City's total water and at a significantly lower price than imported water. The wells undergo routine inspections with downwell videos and flow meters to check the well screen louvers for sanding, clogging and biofilm growth. Maintenance is performed approximately every eight years based on the video and flow meter results. Just after the Notice to Proceed was issued last November to the contractor to start rehabilitation at Dolphin and Tamura Shallow Water Wells, the City's Dolphin Deep Well failed. To address this pending emergency, the water well Contractor was directed to immediately focus on restoring this pump to service. Work on Dolphin Deep Well included troubleshooting and the complete rebuild of the pump at the Contractor's shop. This added approximately 30 working days to the project. Work then started on Dolphin Shallow Well. The initial downwell video revealed a crack in the well casing. The crack was repaired with a high strength steel patch. The City's ground water geologist/consultant Richard Slade and Associates (RSA) then reviewed the video and flow meter data and found Dolphin Shallow Well to be in stable and productive condition after the patch was installed. RSA recommended delaying the planned additional rehabilitation work of the well, which involves rigorous wire brushing and air bursting, until our next scheduled maintenance in 2024. Scheduling and installing the patch required an extension of 20 working days. Work on the Tamura Shallow Well proceeded as originally planned. 4-2 Water Well Rehabilitation — Dolphin and Tamura Shallow Water Wells Notice of Completion for Contract No. 5981 (CAP15-0022, Project No. 15W11) July 26, 2016 Page 3 At the conclusion of the project, the actual cost of bid items constructed was $69,380.00 less than the original bid amount as a result of the rehabilitation bid items that were not performed as planned on Dolphin Shallow Well. In addition to the cost reductions associated with reduced bid item work, two change orders totaling $27,654.99 were approved as part of the contract. The change orders included the above mentioned steel patch, upgrading pump bowls to stainless steel, top column flange replacement, repair of broken bolts on the sole plate, a downwell video survey of Tamura Deep Well and a field trim balance of Tamura Shallow motor. These contract adjustments resulted in the final contract cost coming in approximately 15.1 percent below the original bid amount. A summary of the project schedule is as follows: Estimated Completion Date per Baseline Schedule March 8, 2016 Project Awarded for Construction July 14, 2015 Notice to Proceed November 2, 2015 Contract Completion Date with Approved Extensions May 31, 2016 Actual Substantial Construction Completion Date May 31, 2016 The project was substantially completed as of May 31, 2016. Some miscellaneous close-out items, operation and maintenance turnover, and post -substantial completion activities have been finalized prior to this Notice of Completion action. ENVIRONMENTAL REVIEW: At the July 14, 2015 City Council meeting, the project was found to be exempt from the California Environmental Quality Act (CEQA) pursuant to Section 15302(c) (Reconstruction of existing facility involving negligible or no expansion of capacity) of the CEQA Guidelines, California Code of Regulations, Title 14, Chapter 3, because it has no potential to have a significant effect on the environment. 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: Attachment A — Location Map 4-3 ATTACHMENT A 73 rt FgmOrm Arr,�r,r� I'+runl iI'Valley ti 4ua i r. rid Dr y f° liks ell" STOP h'� viP:ltl��i .r '� dry • 5iartrucks - w y�1 Wafner Ave warngr +Jf S(Zja el I WATER WELL REHABILITATION DOLPHIN AND TAMURA SHALLOW WELLS LOCATION MAP l.II h`JSi�jl��' CITY OF NEWPORT BEACH PUBLIC WORKS DEPARTMENT m a C-5981 07/26/2016 N a 13 S' TON'm Tr'up"I ' C' + kl�l.ri{'niCl Fish & Pei 6 _ l.a PlItrma Ave ui i ti.c�retiburr�� Ave R L l'a tuma Ave � La} -� a La CoLlIt1! ALIdaliLisla Ave aifljir'4-`r � L.)Estre4a Me 1.2rE ireY1p AVS £1 l�urlrul a TAMURA PROJECT LOCATION 17415 MAGNOLIA ST e_ FOUNTAIN VALLEY CA 92708? avTrt1��'r 13L., DOLPHIN PROJECT LOCATION 9649 DOLPHIN AVE FOUNTAIN VALLEY CA 92708 Li Dofla Ct Slaw Ave 51 ter Ave Mur Icier Pry,, hre El Colorado A'.r El "Valle Aver �i Ca rF s El. Blanco Ave d pusllaQ A,vg, El C.1111rao AIM ' ;n 1ourxrtllhvitik'jf WATER WELL REHABILITATION DOLPHIN AND TAMURA SHALLOW WELLS LOCATION MAP l.II h`JSi�jl��' CITY OF NEWPORT BEACH PUBLIC WORKS DEPARTMENT m a C-5981 07/26/2016 N