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Home My WebLink AboutRecommendation for PaymentACT ENGINEERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Recommendation for Payment A&P Consulting Transportation Engineers has been retained by the City of Miami to provide CEI services under Contract # 11-863 for its Storm Garden Sewer Project (Project # B-30183). This project was awarded to JVA Engineering Contractor as low responsible bidder in the amount of $776,678.50. Due to unforeseen conditions and a difference in installed quantities, the contractor submitted Change Order # 1 in the amount of $xxx,xxx.xx. We concur with this amount after reviewing unit prices and performing field measurements. Findings Change Order Item # 1, Item # 2, Item # 3 and Item # 4: Mud Plug Existing Drainage Pipe, Seal Existing Opening on Drainage Structure, Core and Drill Drainage Structure and 8" Diameter Solid DIP. It was necessary to perform these four additional tasks due to existing underground utilities conflicts. In many instances, it was not possible to install drainage as per plans due to these conflicts. There were numerous FPL and AT&T ductbanks running north -south and east -west mainly along 37th Street, 38th Street, and 25th Avenue. Change Order Item # 7: New Concrete C.B. Type D-1. There were two reasons why new structures were added. First of all, after the project was bid, new structures were added due to Public Works review comments. Second, D-1 structures were used where there was conflict with existing underground utilities since these are smaller and shallower structures. Change Order Item # 12and Item # 13: New Embankment Material and Dispose Unsuitable Material. When excavating to install drainage, it was evident that unsuitable material was present at numerous locations; such material had to be removed and replaced with suitable material. Furthermore, NW 37th1 Street from 25th Avenue to 27th Avenue was also found to contain from 12" to 24" of unsuitable material. This area was also demucked and suitable sub -base and base material was placed and compacted to required standards. - PAGE 1- ACT ENGINEERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Change Order Item # 10: 4" Concrete Sidewalk. Additional concrete sidewalk was replaced due to tripping hazard conditions at numerous locations. Even though plans called for sidewalk replacement at some locations, it did not call for replacing all damaged sidewalk. Due to budget constraints, damaged sidewalk couldn't be replaced in its entirety. Most critical areas were targeted when deciding which areas were to be replaced. Change Order Item # 11: Curb and Gutter Steel Reinforcing. Plans did not call for steel reinforcing in curb and gutters. However, steel reinforcing is required as per City of Miami Standards. - PAGE 2- ACT EN61''%'EERS Documentation A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Change Order Item # 1, Item # 2, Item # 3 and Item # 4: Mud Plug Existing Drainage Pipe, Seal Existing Opening on Drainage Structure, Core and Drill Drainage Structure and 8" Diameter Solid DIP. • L �. - PAGE 3- AICT ENGI;;, EERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 - PAGE 4- AICT ENRI EERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Change Order Item # 7: New Concrete C.B. Type D-1. - PAGE 5- AICT ENGINEERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Change Order Item #12and Item # 13: New Embankment Material and Dispose Unsuitable Material. - PAGE 6- AID A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 - PAGE 7- ACT ENGINEERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 - PAGE 8- AID ENGINEERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 - PAGE 9- AID ENGINEERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Cost Comparison Quantities Measured/Calculated Item 1 — Existing drainage pipe connecting to Structure S-2A from the north was plugged (NW 38th Street). For unit cost, refer to Appendix 1: Florida Department of Transportation, Item Average Unit Cost from 2013/06/01 to 2014/05/31. Item 2 — Structures S-2A, S-5, S-6, S-9A, S-11A, and S-12A had to have the opening on the north sealed since all connections coming from the north on NW 38th Street were eliminated (utilities on the north side of NW 38th Street belong to Miami -Dade County). For unit cost, refer to Appendix 2: JVA Engineering Contractor Break Down. Item 3 — Due there were numerous FPL and AT&T ductbanks running north -south and east -west mainly along 37th Street, 38th Street, and 25th Avenue; connections had to be modified and smaller and shallower structures (D-1) had to be installed in some instances. Therefore, new holes had to be core -drilled to the following receiving structures: S-9A, S-11A, S-12A, S-13, S-39, S-41, and S-54A. For unit cost, refer to Appendix 3: JVA Engineering Contractor Break Down. Item 4 — Since some connections described on Item 3 were shallow, 188 LF of 8-inch solid DIP had to be used. A set of two pipes were used at each connection (36 LF for S-9, 36 LF for S-11, 36 LF for S-12, 40 LF for S- 40, and 40 LF for S-41). Item 5 — These structures (S-3, S-7A, S-10, S-14, S-20A, and S-22) were not installed because some of them were going to be in the north side of NW 38th Street whose drainage belongs to Miami -Dade County and others due to underground utility conflicts. The unit cost of these structures averages at $2,600.00 as per contract's schedule of values. Contractor provided a credit of $600.00 per structure for labor and equipment. Item 6 — Structures - PAGE 10- AICT ENGII EERS A&P Consulting Transportation Engineers 10305 N.W. 41st Street, Suite 115 Miami, Florida 33178 Phone: (305) 592-7283 Fax: (305) 593-1594 Item 7 — Due to conflicts discussed in Item 3, structures D-1 had to be installed instead of the ones originally designed at S-9, S-11, S-12, and S13A. The negotiated price was $1,800.00 per structure. Item 8 — New structures that were added after project was bid (S-16, S-54, S-55, and S-14), unit price as per contract's schedule of value. Item 9 — New structures that were added after project was bid (S-16A, S-54A, S-55A, and S-14A). unit price as per contract's schedule of value. Item 10 — We field -measured a total of 1,105 SY of installed 4-inch sidewalk and 673 SY of installed 6-inch sidewalk/driveway. Item No. 12 in contractor's payment requisition has 955 SY of 6-inch sidewalk at a cost of $36.00/SY for a total of $34,380.00. However, since only 673 SY were installed, there is a credit of $10,152.00 (282 SY times $36.00/SY). The negotiated price per SY of 4-inch sidewalk was $34.00. Therefore, the cost of the 1,105 SY is $39,780.00 minus the credit the change order amount should be $29,628.00. Contractor submitted a change order in the amount of $27,404.00. Item 11 — We field measured 1,270 LF of curb and gutter that was reinforced with two # 4 rebars. Item 12 — 3,907 CY of unsuitable material had to be removed and the same volume of suitable material had to be delivered, placed and compacted. See Table # X for volume calculation. Table - PAGE 11-