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Home My WebLink AboutItem #07 Approval of Change Order No. 2 for Lift Station 7 and Force Main Relocation Project center of GOOd LJ ~ AGENDA ITEM COVER SHEET Meeting Date: April 21, 2009 Item # ., Contact Name: Contact Number: David Wheeler 407 -905-3100, ext. 1504 Reviewed By: ~~ Department Director: ~L, ~~lr City Manager: _ _ ~ =-=-= Subject: Approval of and authorization for the Mayor to execute Change Order NO.2 for the Lift Station 7 and Force Main Relocation Project, and to authorize the funds required to implement the change order. Background Summary: Lift Station 7 handles 60% of the sanitary sewer flows in the City system. The existing force main on SR 50 that receives the output from Lift Station 7 is subject to frequent breaks due to pipe wall fatigue, and the wet well of the lift station is seriously damaged by spalling caused by the corrosive atmosphere in the structure. A project was initiated last year to replace the existing 12-inch force main located along the northern SR 50 right of way with a 16-inch line located further north that would connect a rehabilitated Lift Station 7 to an existing force main on Clarke Road. The decision was made in November 2008 to relocate Lift Station 7 rather than rehabilitate the existing facility. Relocation meant that a new Lift Station 7 would be built north of the current location so as to more readily facilitate development of the surrounding property. The initial design for the new lift station was based on 8-inch stand piping; however, due to the facility's high flows, the station's internal piping needs to be increased to 10-inch. In addition, it is desired to increase emergency by-pass pumping pipe size from 4 inches to 10 inches. Pricing for Change Order No. 1 was based on the 8- and 4-inch combination of pipe and fittings. Collectively, all revisions included in this change order total less than 3% of overall project costs. Due to size of the lift station, standby generation is required and the City Commission previously approved the purchase of a new generator. The configuration of the selected generator is larger than previously considered, thus the generator slab (future building foundation) requires upsizing. Upon development of the site, a building will be constructed to enclose the generator and control panel. Also, subsurface conditions encountered at the new lift station location mandated that mechanical dewatering be accomplished prior to and during construction of the wet well. Finally, tying in the new lift station gravity system to the SR 50 collection system will result in a period of time when the contractor will need to pump effluent around the old lift station as the gravity sewer line from SR 50 is connected to the gravity line installed from the new lift station. Issue: The Engineering Department has proposed a change order to implement the project modifications identified in cooperation with the Utilities Department. Both involved City departments have reviewed the proposed prices for new bid items and believe them to be reasonable and comparable; other prices were established in the contract bid or previous change order. 1 Two subsequent change orders should be expected for this project. The first will add a short extension to the new force main so as to connect it to the output of the Health Central complex on Blackwood Avenue at SR 50. Once that is accomplished, a subsequent change order will be required to take the old force main along the north side of SR 50 out of service and put it into a stable condition. Recommendations The Engineering and Utilities Departments recommend that the City Commission approve the proposed Change Order No.2, authorize the Mayor and City Clerk to execute the required legal documents, and direct the Finance Department to make the related fund allocations to the project budget and to revise the purchase order issued to the Contractor to reflect the increase in project budget. Implicit in these actions is approval of the related revisions to the "2003 Issue Bond Project Schedule." Attachments: Proposed Change Order NO.2. Financial Impact: The $35,632.38 in funding for this action will be derived from a reallocation of funds from the Utility Bond Issue. Type of Item: (please mark with an "x'J Public Hearing Ordinance First Reading Ordinance Second Reading Resolution _ Commission Approval Discussion & Direction For Clerk's Deot Use: _____ Consent Agenda Public Hearing _____ Regular Agenda X Original Document/Contract Attached for Execution by City Clerk == Original Document/Contract Held by Department for Execution Reviewed by City Attorney Reviewed by Finance Dept. Reviewed by ( ) ~~ N/A N/A N/A 2 center of Good Li . <\,~e .. .~. ~~ CITY OF OCOEE 150 North Lakeshore Drive Ocoee, Florida 34761 CITY OF OCOEE CHANGE ORDER NO.2 LIFT STATION NO.7 AND FORCE MAIN RELOCATION DATE: April 14, 2009 CONTRACTOR: GWP Construction, Inc., Ocala, FL NOTICE TO PROCEED DATE: October 15, 2008 The following changes are hereby made to the CONTRACT DOCUMENTS. Original CONTRACT PRICE $1.012.040.80 Current CONTRACT PRICE ADJUSTED by previous CHANGE ORDER $1.199.879.30 Net Increase (Decrease) Resulting from this CHANGE ORDER $35.632.38 The current CONTRACT PRICE including this CHANGE ORDER $1.235.511.68 Original CONTRACT COMPLETION DATE: Julv 22. 2009 Current CONTRACT COMPLETION DATE adjusted by previous CHANGE ORDERS July 22. 2009 Net Increase Resulting from this CHANGE ORDER 0 days Current CONTRACT COMPLETION DATE including this CHANGE ORDER Julv 22. 2009 Lift Station 7 & Force Main Relocation, Change Order #2 1 CHANGES ORDERED: I. REQUIRED CHANGES Three events have occurred to impose higher project costs. Piping and fittings are being upsized from 8-inch to lO-inch diameter in order to provide sufficient flow capacity. The deep wet-well required dewatering. A larger concrete slab is required to support the standby generator. Bypass pumping is necessary in order to divert flows around the old lift station as the inflow pipe is redirected to the new lift station without interruption of service. II. JUSTIFICA nON The decision was made in November 2008 to relocate Lift Station 7 rather than rehabilitate the existing facility. The initial design was based on 8-inch piping within the new lift station; however, more recent modeling of facility flows indicated that 10-inch piping was required. Pricing for Change Order No.1 was based on the 8-inch pipe and fittings. With a concurrent increase to lO-inch pumps in order to achieve the required flow rates, the facility will require a standby generator with a higher power output and a subsequent increase in the size of the building that encloses it. Subsurface conditions encountered at the new location mandated that mechanical dewatering be accomplished prior to and during lift station wet-well construction. Tying in the new lift station will result in a period of time when the contractor will need to pump effluent around the old lift station as the gravity sewer line from SR 50 is connected to the gravity installed to the new lift station. III. NARRATIVE OF NEGOTIATIONS Change order is based on mutual agreement by the parties and actual contractor costs. The Engineering and Utilities departments were involved in the negotiations. IV. PAYMENT The following bid items are hereby added to the contract in the quantities shown. Item No. Descrintion Quantity Unit Unit Price Price COlI Upsize lift station I Lump Sum $20,481.3 8 $20,481.3 8 pipe and fittings COl2 Mechanical I Lump Sum $6,600.00 $6,600.00 dewatering Increase in COB generator 1 Lump Sum $1,021.00 $1,021.00 foundation size COl4 Gravity sewer 1 Lump Sum $7,530.00 $7,530.00 bypass pumping TOTAL $35,632.38 Lift Station 7 & Force Main Relocation, Change Order #2 2 V. APPROVAL AND CHANGE AUTHORIZATION This proposed change to the Contract is to be approved by the City of Ocoee Commission. The aforementioned changes, and work affected thereby, are subject to all provisions of the original contract not specifically changed by this Change Order. It is expressly understood and agreed that the approval of the Change Order shall have no effect on the original contract other than matters expressly provided herein. CONTRACTOR acknowledges, by its execution and acceptance of this Change Order, that the adjustments in Contract Price and Time shown hereon constitute full and complete compensation and satisfaction for all costs and modifications of performance time incurred by the CONTRACTOR as a result of this Change Order. No other claim for increased costs of performance or modifications oftime will be granted by the OWNER for the Work covered by this Change Order. The CONTRACTOR hereby waives and releases any further claims for cost or time against the OWNER arising from or relating to the matters or Work set forth or contemplated by this Change Order. RECOMMENDED BY: ACCEPTED BY: CITY OF OCOEE. FLORIDA GWP CONSTRUCTION. INC. By: By: Signature Signature Date: Date: Title: Title: APPROVED BY: CITY OF OCOEE. FLORIDA Owner By: Date Attest: FOR USE AND RELIANCE ONLY BY THE CITY OF OCOEE, APPROVED AS TO FORM AND LEGALITY THIS DAY OF ,2009. APPROVED BY THE CITY OF OCOEE COMMISSION IN A MEETING HELD ON , 2009 UNDER AGENDA ITEM NO. By: City Attorney END OF CHANGE ORDER NO 2 Lift Station 7 & Force Main Relocation, Change Order #2 3 Page 1 of 1 Butler, AI From: Brad McCullough [BradM@gwpconstruction.com] Sent: Monday, April 13, 20092:28 PM To: Smith, Charles Cc: ocoee2809; Butler, AI Subject: Building Pad - Revised Charles, The upgrade for the larger generator / building pad is $1,021.00 this should complete the numbers for the change order, Please review & comment. Lift Station / Yard Fittings & Valves - $27,081.00 By Pass Pumping - $7,530.00 Generator / Building Pad - $1,021.00 Total - $35,632.00 Thanks, D Brad McCullough Project Coordinator GWP Construction, Inc. 352-351-2412 fax 352-351-2430 cell 352-258-1364 As a reminder our new mailing address is 4269 NW 44th Ave, Suite A Ocala, FL 34482 4/14/2009 GWP CONSTRUCTION, INC 4269 NW 44th Ave, Suite A Oeala, FL 34482 352-351-2412 Fax 352-351-2430 April 3, 2009 City of Ocoee 150 North Lakeshore Drive Ocoee, FL. 34761 Attn: AI Butler Subject: Lift Station # 7 Relocation Re: PCO 2809-002 Material Size Increase AI, Per our March 24,2009 meeting, I have prepared the following information regarding; lift station & yard piping & fittings. I have also included the loss of dewatering charges when the future FM connection and flow meter was deleted from change order # 1. Lift Station PiDina & Fittinas Lift Station Pipe & Fittings (original quote with 8" material) $17,240.16 Lift Station Pipe $ Fittings (revised quote with 10" material) $25,592.49 Net Increase for Lift Station Pipe & Fittings $8,352.33 Yard PiDina & Fittings Yard Piping & Fittings (original quote with 8" material with 4" pump off) $14,077.10 Yard Piping & Fittings (revised quote with 10" material with 8" pump off) $26,206.15 Net Increase for Yard Piping & Fittings $12,129.05 Note: 10" pump off is not offered; therefore 8" pump off is quoted De-Waterina (Well Points Deleted in Chanae Order # 1) Future FM Connection $2,200.00 Flow Meter $4,400.00 Net Increase for De-Watering $6,600.00 I Net Change Order Requested $27,081.38 I GWP CONSTRUCTION, INC 4269 NW 44th Ave, Suite A Ocala, FL 34482 352-351-2412 Fax 352-351-2430 Please let me know if you have any questions or concerns regarding the above. Thanks, Brad McCullough Project Coordinator GWP Construction Page 1 of2 Butler, AI From: Brad McCullough [BradM@gwpconstruction.com] Sent: Wednesday, April 08, 2009 8:38 AM To: Smith, Charles Cc: Butler, AI; ocoee2809 Subject: RE: Material Size Increase Charles, I have listed (below) the cost for by-pass pumping (turn Key): (1) High Pressure Sewage Pump 1,540 GPM (1) High Pressure Sewage Pump 1,540 GPM (Stand-by Unit) (1) Auto Dialer Remote Notification System (2) Auto Start/Stop Float System W/Rail (2) 6" x 20' Suction Hoses W/Strainers (1) 6" - 150' High Pressure Discharge Hose (Discharge into MH # 6) (1) 6" Manifold with Valves (1) 6" Spool Flange with ARV and Pressure Gauge * Fuel Throughout the by-pass * Labor to Maintain the Pumps Cost - $7,530.00 (Weekly Rental Rate) Thanks, D Brad McCullough Project Coordinator GWP Construction, Inc. 352-351-2412 fax 352-351-2430 cell 352-258-1364 As a reminder our new mailing address is 4269 NW 44th Ave, Suite A Ocala, FL 34482 From: Smith, Charles [mailto:CSmith@ci.ocoee.f1.us] Sent: Tuesday, April 07, 2009 8:01 AM To: Brad McCullough Cc: Butler, AI Subject: RE: Material Size Increase Where is by-pass pumping? From: Brad McCullough [mailto:BradM@gwpconstruction.com] Sent: Tuesday, April 07, 2009 7:43 AM To: Butler, AI 4/13/2009 Page 2 of2 Cc: Smith, Charles; ocoee2809 Subject: Material Size Increase AI, Please find the attached letter regarding material size increase. Thanks, DSrad McCullough Project Coordinator GWP Construction, Inc. 352-351-2412 fax 352-351-2430 cell 352-258-1364 As a reminder our new mailing address is 4269 NW 44th Ave. Suite A Ocala, FL 34482 4/13/2009