The URL can be used to link to this page

Home My WebLink AboutC2020-183 - 5/19/2020 - Approved AO II, CITY OF CORPUS CHRISTI .,f ENGINEERING SERVICES "'' ` CHANGE ORDER CHANGE ORDER NO: 2 CHANGE ORDER DATE: 5/82020 PROJECT: Nueces River Raw Water Pump Station Improvements PROJECT NUMBER: E11068 CONTRACTOR: CSA Construction,Inc. ORIGINAL CONTRACT TIME: 548 CD's ENGINEER: Urban Engineering Make the following additions,modifications or deletions to the work described in the Contract Documents: ADDITIONS Cost Proposals 36,8-11 Quantity Unit Unit Price Total Cost Proposal 3: Ethernet Equipment(RFI 2) 1 LS $ 6,375.00 S 6,375.00 Additional Contract Days due to added scope 0 DAYS $ - $ - Cost Proposal 4: Additional Power Circuits for Instruments(RFI 3) 1 LS $ 24,207.00 $ 24,207.00 Additional Contract Days due to added scope 13 DAYS $ - $ - Cost Proposal 5: Dewater Splitter Box(Revised 05/0620) 1 LS $ 19,941.00 $ 19,941.00 Additional Contract Days due to added scope 1 DAYS $ - $ - Cost Proposal 6: Connection to AEP Substation(RFI 11)(Revised 03/04/20) 1 LS $ 222,685.00 S 222,685.00 Additional Contract Days due to added scope 15 DAYS $ - $ - Cost Proposal 8: Refurbish existing Pump#3 at Pump Building#1(Revised 05/0620) I LS $ 20,206.00 $ 20,206.00 Additional Contract Days due to added scope 1 DAYS $ - $ - Cost Proposal 9: Refurbish Existing Mechanical Screen(I each)(4)Pump Building#1(Revised 05/1 t LS $ 350,008.00 S 350,008.00 Additional Contract Days due to added scope 25 DAYS $ - $ - Cost Proposal 10: Replace Existing 24"&30"Check Valves @ Pump Bldg.#1(Revised 05/0520) I LS $ 99,889.00 $ 99,889.00 Additional Contract Days due to added scope 0 DAYS $ - $ - Cost Proposal 11: Replace Existing Concrete Slab Q Pump Bldg.#1(RFI#23)(Revised 05/0120) 1 LS S 45,377.00 $ 45,377.00 Additional Contract Days due to added scope 21 DAYS $ - $ - Additions Total: $ 788,688.00 DELETIONS Cost Proposal 7 Quantity Unit Unit Price Total Cost Proposal 7: Revisions to Check Valve on Pump#10 1 FPP $ (17,026.00) $ (17,026.00) Additional Contract Days due to added scope 0 DAYS $ - $ - Deletions Total: $ (17,026.00) Additional Calendar Days requested 76 NET TOTAL OF THIS CHANGE ORDER: $ 771,662.00 Why was this Change necessary: Cost Proposal No.3-Adding and replacing the modules will improve the communication network between the Nueces River Pump Station and ONS WTP. Cost Proposal No.4-Plans did not provide required information on the power supply to the flow instruments.New scope is to provide conduit and wire from power panels which will provide 120 power supply to the instruments. Cost Proposal No.5-Isolation of water flow was not obtained due to valve malfunction requiring a set up to dewater and maintain low water level at Splitter Box allowing Contractor to proceed with inserting a temporary isolation air plug. Cost Proposal No,6-This change order is to provide compensation to AEP for duct bank inside their substation fence line which also require new conductors and new fuse holders.Do to high voltage area all excavation must be done by hand by a licensed and certified contractor through AEP. Cost Proposal No.7-This check valve which is rehtavely new needs the existing lever and weight with air cushion equipment replaced to match other existing check valves. Cost Proposal No.8-Pumps No.3&4 at Pump Building No.1 need to be refurbished due to loss of metal thickness.Reports recommend refurbishment in order to restore metal loss.This cost also includes loading and unloading pumps,transporting to shop and replacement of the top shaft and packing gland hardware.There is no refurbishment on pump No.4. Cost Proposal No.9-The Pump Building No.1 West bar screen is currently non-operational and has been for the last 5 years. The manufacturer's recommendation is to refurbish the existing bar screen which includes replacement of all moving components with the latest system components. In addition the Pump Building No.1 East bar screen is in need of maintenance which will include the replacement of bearings,shafts and bushings. Cost Proposal No,10-Due to corrosion build up on the 24"and the 30"check valves on the interior body components it is recommended to replace both valves due to no possible guarantee tht refurbishing will be adequate for durability.Modifications are required on the line in order to replace the 30"check valve.This would include a reducer fitting with the new 30"check valve with air cushion. Cost Proposal No.11.-Existing foundation to pump building#1 was found to be critical condition after contractor exposed the concrete.Existing interior beams have large voids and the lower reinforced steel mat is exposed to the environment.Recommendation is to replace the foundation due to deterioration. The compensation agreed upon in this Change Order is full,complete and final payment for all costs the Contractor may incur as a result of or relating to this change whether said costs are known, unknown,foreseen or unforseen at this time,including without limitation,any cost for delay,extended overhead,ripple or impact cost,or any other effect on changed or unchanged work as a result of this Change Order. SCANNED Page 1 of 2 CITY OF CORPUS CHRISTI ENGINEERING SERVICES CHANGE ORDER CHANGE ORDER NO: 2 CHANGE ORDER DATE: 5/8/2020 PROJECT: Nueces River Raw Water Pump Station Improvements PROJECT NUMBER: E11068 CONTRACTOR: CSA Construction,Inc. ORIGINAL CONTRACT TIME: 548 CD's ENGINEER: Urban Engineering Original Contract Amount S 12,950,000.00 Total Change Order Contingency Amount(25%) $ 3,237,500.00 Remaining Available Contingency Amount(including this CO) $ 2,465,838.00 Previously Approved Change Order Amount S Proposed Change Order Amount $ 771,662.00 Revised Contract Amount $ 13,721,662.00 Percent of Total Change Orders(including this CO) 5.96% Original Contract Time for Substantial Completion 548 CD's Notice to Proceed Date 3/12019 Original Substantial Completion Date 8/30/2020 Previously Approved Change Order Time 30 CD's Additional Time on This Change Order 76 CD's Revised Contract Time for Substantial Completion 654 CD's 1 Revised Substantial Completion Date 12/14/2020 IREVIEWED BY: Urban Engineering REQUESTED BY:CSA Construction,Inc. n/a ,s„ 1, 2 5-12-2020 Engineer Date rim Robertson Date QTY U Project Manager Digitally signed byi3retc/anORPUS CHRISTI Water 2020 Water Fund 4010 Brett Van Hazel Hazel Date:2020.05.1216:08:35 FUND: 4099-041 4010-30230-068 RECOMMENDED BY: -05'00' ACCOUNT: 550910 530000 Brett Van Hazel Date ACTIVITY: E11068-01-4099-EXP E11068-01-4010-EXP Construction Engineer AMOUNT: $431,662 $340,000 Digitally signed tryldfEdmonds Cit.-2.a*Aile ON:co-Jeff Edmonds,o=City of Corpus Christi,ou=Englneedng Services,email=je((reye�cctezas.com, ceS RECOMMENDED BY: • Dace 2020.05.190800:43 05.00' APPROVED BY:I/ _' ` _1• Jeffrey Edmonds,P.E. Date Michael Rodriguez Date Director of Engineering Services Chief of Staff Digitally ned try Kent Mcllya DN:cn=Ksigent Mdlyar,o.en r snail=kentmcOcctenas.conl,4415RECOMMENDED BY: EIZC-4701,1tC,Apr-Ito-vat 5/1 8/2020 APPROVED AS TO Date:2020.05.1818:03:12-05'00' Eddie Houlihan,Director Date FORM:Kent Mcilyar Date Management and Budget Assistant City Attorney ATTEST: , RE-ECCA HUERTA CITY SECRETARY -, IR moll........t a y/ l A , , Page 2 of 2 SEGRE ,v51