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Home My WebLink AboutC2016-437 - 8/23/2016 - NA CITY OF CORPUS CHRISTI AMENDMENT NO. 2 CONTRACT FOR PROFESSIONAL SERVICES The City of Corpus Christi, Texas, a Texas home-rule municipal corporation ("City") and Urban Engineering ("Consultant"), agree to the following amendments to the Contract for Professional Services for Greenwood Wastewater Treatment Plant Process Rehabilitation Replacement(Protect No. E13026): Original Contract August 16, 2013 Administrative Approval $49,840 , Amendment No. 1 ! April 15, 2014 Motion No. M2014-048 $32,710 In the Original Contract, Exhibit"A", Scope of Services shall be amended as set forth in the attached Amendment No.2, Exhibit"A" In the Original Contract, Fees section shall be amended based on the modified scope of services in the attached Amendment No. 2, Exhibit"A"for a fee not to exceed $17,480, for a total restated fee not to exceed $100,030 All other terms and conditions of the August 16, 2013 Contract for Professional Services between the City and Consultant,and of any amendments to that contract,which are not specifically addressed herein shall remain in full force and effect. CIT 4 0 • ,S 614-1;Ak %�� URBAN ENGINEERING AO 11 j •+ I Date 2:1-4 9/12(1( Val H P Gray, E + �( D.te James L Urban, P.E. Exe. . ive Direct. of Pu 1 lic ork Principal 2725 Swantner Drive Corpus Christi, TX 78404 (361)854-3101 Office (361) 854-6001 Fax APPROVED AS TO LEGAL FORM �AAimee Alcorn-Reed 2016.08.19 09:50:22-05'00' Assistant City Attorney Date ATTEST City Secretary Date Project Number E13026 Accounting Unit 4254-064 Account 550950 Activity E 13026014254EXP Account Category 50950 Fund Name Wastewater 2015 ....._...... 2016-437 8/23/16 ;WATER1E13026 GREENWOOD WWTP PROCESS REHABILITATION REPLACEMENT/OMNI/MMT NO?CONTRACT DDC REV 10/1115 Urban Engineering INDEXED • LI RBAN Job No. 26175.B1.01 ENGINEERING May 10, 2016 TRANSMITTED VIA EMAIL Mr. Jeffrey Edmonds, P.E. Director of Engineering Services City of Corpus Christi P. O. Box 9277 Corpus Christi, Texas 78469 Subject: Greenwood Wastewater Treatment Plant Process Rehabilitation/Replacement City Project No. E13026 Dear Jeff: We have a project at the Greenwood WWTP that involves various improvements to the Influent Structure, Primary Clarifiers, Primary Digesters, Secondary Digester and Aeration Basin. The Contractor is Palacios Marine Industrial (PMI), the bid opening was May 21, 2014 and the Notice To Proceed (NTP) was issued September 2, 2014. PMI has completed improvements to the Primary Clarifiers, Primary Digesters and Secondary Digesters and is currently working on improvements to the Influent Structure. Improvements to the Aeration Basin still need to be made. Over the course of the construction phase there are several issues that have arisen for which we are requesting additional A/E fee for. These issues are discussed in the following: ADDITIONAL CONSTRUCTION SCOPE At the City's request we put together two change orders with PMI to deal with issues that arose at the plant during the construction offs profecf. 1. End Wall Repairs to Influent Structure (Change Order No. 1): Once the Influent Structure was drained and cleaned, it was found that there was severe corrosion of the existing concrete walls and beams and missing concrete on the end of the walls at the east end of the structure. The wall ends needed to be rebuilt and coated to extend their life, to provide support for the existing beams and to allow the installation of the new slide gates provided as part of this project. We went there several iterations with PMI's original cost proposal of $139,800 and were able to negotiate a final cost of $62,950. 2. Aeration Basin No. 1 Air Bridge Repairs (Change Order No. 1): The existing 128' long air bridge over Aeration Basin No. 1 was constructed in 1990 and has three vertical supports spaced over the length of the bridge/aeration basin. The vertical supports are severely corroded at the water level and the conditions of the vertical supports are such that it is not safe to walk on. We looked at a couple of options for resolving this matter and worked with the City staff and PMI to prepare a change order. We negotiated PMI's original cost proposal of$56,241 down to $32,001 and prepared a change order. 3. Primary Clarifier No. 4 Scum Baffle Replacement (Change Order No. 2): The original scope did not call for the replacement of the scum baffle but to clean and coat it. After the Contractor drained the structure and began sandblasting the existing scum baffle, it was determined that the severity of the corrosion was beyond repair. A Change Order in the amount of$40,872 was negotiated to provide a new scum baffle for the Clarifier. (361)854-3101 2725 SWANTNER DR.• CORPUS CHRISTI,TEXAS 78404 FAX(361)854-6001 www.urbaneng.com TBPE Firm#145 TBPLS Firm #10032400 AMEND. NO. 2 EXHIBIT "A" Page 1 of 3 Jeffrey Edmonds,P.E. May 10, 2016 Page 2 The additional engineering services required for the additional work items included in the change orders include initial investigation, site visits, locating original equipment drawings, developing scope and exhibits, contacting the Contractor concerning the additional work, negotiating and preparing change order, answering Contractor questions, checking progress, punch lists and checking completion. For both of the change orders, a significant amount of time was spent negotiating a reasonable change order price with the Contractor. We request that our present AE contract be amended by $8,800 to add the engineering services to accomplish this additional work. EXTENDED CONSTRUCTION DURATION As noted above this project was bid in May 2014 and NTP issued-on Sept. 2, 2014. Contract time started on Sept. 15, 2014. Original contract days provided for this project amounted to 180 Days (six months). Time was extended by 125 Days (four months) with the change orders described above,for a new total contract time of 305 Days(10 months). There have been various issues which have affected the timely completion of this project. The delivery of the new slide gates to be installed in the Influent Structure was much longer than anticipated, the condition of the influent Structure splitter box, which resulted in Change Order No. 1, delayed the project while options were evaluated and decisions made and the condition of other equipment and structures in the plant affected the starting and completion of some portions of this project. The project is now expected to be completed by the end of June 2016. Our original AE fee did not anticipate a 22 month long construction duration. We are requested that our fee be amended by $9000 to cover the additional engineering services provided during the additional 12 months above the original and amended time of ten months and allow us to see this project through completion. This fee will cover the additional site visits made, meetings with Contractor and City, dealing with scheduling issues, phone calls with Contractor and Inspector and dealing with Contractor issues for other issues at the Influent Structure. We request that our present AE contract be amended by$17,480 to add the engineering services to accomplish this additional work noted above. Attached is a proposed Summary of Fees table that has been revised to include the proposed Amendment No. 2 to this project. Please review and let me know should you have any questions or comments. • Sincerely, URBAN ENGINEERING Mark Maroney, P. E. MM/bdw Enclosure xc: Daniel Deng, P.E.—Engineering Services via email Kent Power, P.E.—Construction Services via email AMEND. NO. 2 EXHIBIT"A" Page 2 of 3 ' , :, GREENWOOD WWTP PROCESS REHABILITATION/REPLACEMENT CITY PROJECT NO. E13026 5/10/2016 Summary of Fees Original Amend. No. 1 Amend. No.2 Total Fee Contract Basic Services Fees 1. Preliminary Phase $8,100.00 $0.00 $0.00 $8,100.00 2. Design Phase 33,900.00 12,100.00 0.00 46,000.00 3. Bid Phase 0.00 4,200.00 0.00 4,200.00 4. Construction Administration Phase 0.00 14,010.00 0.00 14,010.00 Subtotal Basic Services Fees $42,000.00 $30,310.00 $0.00 $72,310.00 Additional Services Fees 1. Permit Preparation(as applicable) 0.00 0.00 0.00 0.00 2. ROW Acquisition Survey 0.00 0.00 0.00 0.00 3. Topographic Survey\Field Investigation 7,840.00 0.00 0.00 7,840.00 4. Environmental Issues 0.00 0.00 0.00 0.00 5. Construction Observation Services 0.00 0.00 0.00 0.00 6. Start-up Services 0.00 0.00 0.00 0.00 7.Warranty Phase 0.00 2,400.00 0.00 2,400.00 8.Additional Work for Infl. Structure, 0.00 0.00 17,480.00 17,480.00 Aeration Basin and Project Duration Sub-Total Additional Services Fees $7,840.00 $2,400.00 $17,480.00 $27,720.00 Total Authorized Fee $49,840.00 $32,710.00 $17,480.00 $100,030.00 08/20/13 04/15/14 Admin Approval M2014-048 AMEND. NO.2 EXHIBIT"A" Page 3 of 3