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HomeMy WebLinkAboutItem 3d: Accept Work by Pacific Hydrotech for Longley Well No. 3, Camino Real Well No. 3 & Well Facilities as Complete & Authorize Final Payment Iaeo.p.nud ( -4—V 7 3 . fd3 9 ° ��Y °os` STAFF REPORT Public. Works Services Department DATE: June 21, 2011 TO: Mayor and City Council FROM: Tom Tait, Public Works Services Director T Prepared by: Ken Herman, Deputy Public Works Services Director Tiffany Lee, Associate Civil Engineer SUBJECT: ACCEPT ALL WORK PERFORMED BY PACIFIC HYDROTECH CORPORATION FOR THE CONSTRUCTION OF LONGLEY WELL NO. 3 AND CAMINO REAL WELL NO. 3 AND WELL FACILITIES AS COMPLETE AND AUTHORIZE THE FINAL PAYMENT TO BE MADE IN ACCORDANCE WITH THE CONTRACT DOCUMENTS. Recommendation: Approve SUMMARY On August 18, 2009 the City Council awarded a contract to Pacific Hydrotech Corporation in the amount of $2,881,539 for the construction of the Longley Well No. 3 and Camino Real Well No. 3 Well and Well Facilities (Attachment). The terms and conditions of this project have been complied with and the work has been performed to staff's satisfaction for a total project cost of $2,855,151.66. This amount reflects the original contract amount of $2,881,539 plus nine (9) contract change orders for additional and deleted work, totaling a credit of $26,387.34 to the original contract price. Staff recommends that the City Council accept all work performed by Pacific Hydrotech Corporation as complete and authorize the final payment to be made in accordance with the contract documents, subject to retention of $285,515.17. DISCUSSION The City receives its water from two groundwater basins, the Raymond Basin in the northeast section of the city, and the Main San Gabriel Basin in the southeast section of the city. In recent years the Raymond Basin has had several challenges due to the natural replenishment of the Basin not being able to keep up with the demand from its users. This has resulted in lower groundwater levels, a reduction in pumping rights in the basin, and difficulty pumping the allotted rights. Page 1 of 3 Mayor and City Council June 21, 2011 Anticipating these limitations, Camino Real Well No.3 and Longley Well No.3 were proposed and accepted by the City Council as part of the 2009 -10 Capital Improvement Program. In addition to acting as a redundant source of supply, these new wells help meet system demands during high demand periods. Redundancy in a water supply system is necessary to ensure a reliable source of supply in the event of a natural disaster, extended power outage, equipment failure or contamination of a well. Additionally, this redundancy allows the City to avoid using the MWD emergency connection which is a more expensive source of water. The Longley Well No.3 is an 885 -foot deep well which produces 1,800 gallons of water per minute from depths of between 545 and 845 feet below ground surface. The Camino Real Well No.3 is a 940 -foot deep well that produces 2,500 gallons of water per minute from depths of between 625 and 915 feet below ground surface. Combined, these wells have the capacity to provide water for approximately 7,500 households per day. The final construction cost of the Longley Well No.3 and Camino Real Well No. 3 and their facilities is $2,855,151.66. This amount reflects the original contract amount of $2,881,539 plus nine (9) contract change orders for additional and deleted work, totaling a credit of $26,387.34 of the original contract price. During the drilling of the pilot hole at the Camino Real Well, it was necessary for the contractor to fill voids in the sidewall of the hole with concrete to keep the pilot hole from collapsing. Due to the instability of the pilot hole, the total drilling depth was reduced, with an overall savings in labor and materials (Change Orders 1- 3 and 5 as listed below). Minor modifications were also made to the electrical and controls design for both wells to deal with unforeseen requirements of the motors (Change Orders 6 -8). The following is a summary of those changes: Change Order Description of Extra Work Cost ($) 1 -3 Extra labor and materials needed to prevent the 45,795 Camino Real Well hole from collapsing during drilling. The contractor used concrete and a drilling additive to provide support to the sidewalls of the hole during this phase. 4 Modify existing pump enclosure at the Camino Real 22,903 Well to accommodate new pump motor and add electrical conduits to the pump pedestal. 5 Reduce the Camino Real Well pilot hole depth from (118,988) 1200' to 900' and reduce the amount of screened casing in the well hole. Page 2 of 3 Mayor and City Council June 21, 2011 6 Modify electrical wiring and controls at the Camino 21,618 Real Well to accommodate final motor design 7 -8 Modify electrical wiring and controls at the Longley Well 5,285 to accommodate final motor design 9 Reduce Longley Well column size from 12" to 10" (3,000) diameter Total Cost $ (26,387.34) The terms and conditions of this contract have been complied with and the work has been performed to staff's satisfaction. Staff commends that the City Council accept all work performed by Pacific Hydrotech Corporation as complete and authorize the final payment to be made in accordance with the contract documents, subject to retention of $285,515.17 ENVIRONMENTAL IMPACT: On November 18, 2008 the City Council adopted Mitigated Negative Declaration for the project and met CEQA requirements. The US EPA has reviewed the CEQA documents, completed Environmental Assessment (EA) and on August 7, 2009 in accordance with the NEPA documentation, adopted a Finding of No Significant Impact (FONSI) for the project. This cleared the project for award processing. FISCAL IMPACT Water Funds in the amount of $3,400,000 are budgeted in the 2008 -2009 Capital Improvement Program for the Longley and Camino Well Construction. This work is partially funded by the EPA in the amount of $1,570,333 with the remaining balance of $1,829,667 funded by the Water Fund. RECOMMENDATIONS 1. Accept all work performed by Pacific Hydrotech Corporation for the construction of Longley Well No. 3 and Camino Real Well No. 3 and Well Facilities as complete 2. Authorize final payment to be made in accordance with the contract documents, subject to retention of $285,515.17 Approved by: ► -�� Donald Penman, City Manager TT:KH:TL Page 3 of 3 LONGLEY WLL NO. 3 AND CAMINO REAL WELL NO. 3 t J -- - - - - 0 li")? _r e di., ‘,... . . NORTH ,, • CITY OF ARCADIA • 11 ELK' , S GRAND VIEW \, 4 , m 1 T o O a" w SIE;.., •.REEL : ° Pr b . O m 1110 V ORANGE GROVE Ili ° S m \\\ FODTHII L RL PMK ' ,. .3_,,,s....):11..) rOO�111LL ry . COLORADO \..... ...v.( .. 6 J fMI Ai e. p MRA ' � j ° a ' r+,7 44t) , ®I� 2 ~ 7 1 • \ c2 . h � / / �o } \ PROJECT LOCATION 0 2 -4 CAMINO REAL WELL NO. 3 ,,' o ,1 4 am HUN I I\ r 041 04 a; r a Rp \ ) Z < O UARTE w Z \ N : � A■• �� 1 CAMINO REAL O Z = a H a w . z � Jr o LONGDEN '� w • �� PALM DR 1 LIVE O DR ®� - \ 1 PROJECT LOCATION n � y. LONGLEY WELL NO. 3 r 'r'` d PROJECT LOCATION MAP