R L Alia Company 11/28/2017 Change Order 1

Project: Hayes Street Regulator& CSO Control Change Order No.1 Change Order Effective Date: 10/18/17 JUSTIFICATION: Item#5—Traffic Control Labor. The deleted hours for Traffic Control Labor will not be needed to complete Work on the project. Item#12—Crushed Surfacing Base Course,and Item#13—HMA CL 'A-inch PG 64-22. Additional area requiring grading and paving along Hayes Street is being added to the project, resulting in additional tons of Crushed Surfacing Base Course and tons of HMA CL '/s inch PG 64-22 to be incorporated into the project. Deleting Item#21—LS#9 Structure,for Screening Equipment, and adding new Item#54—LS #9 Modified Screen Vault Structure. The original design called for the Contractor to provide a new lid on existing manhole W02, adjacent to Lift Station#9, to accept new screening equipment and provide a new 6' by 6' by 4' deep precast vault adjacent to existing manhole W02, as the debris receptacle. After reviewing the geometry of the pipe flows entering into existing manhole W02 and coordinating with the mechanical screening equipment supplier,the Engineers determined that the new mechanical screening equipment would work more effectively if a new modified screen vault structure could be built in the location of existing manhole W02, which would incorporate both the new screening equipment and the removable debris receptacle. Furthermore,the new larger vault would make it possible to install slightly larger screen equipment thus doubling the flow capacity of the screen unit. The new modified Screen Vault Structural design is approximately 14' by 8' by 21' deep and requires the cast-in-place approach, as it has to match up adjacent to an existing concrete block off the edge of lift station#9.This new cast-in- place structure is significantly larger in plan view and deeper in depth,than the previously designed 6' by 6' by 4' deep,precast vault, originally called for in the bid documents. Item#32--Control Density Fill(CDF) for Filling Pipes. The deleted cubic yards of Control Density Fill (CDF)for Filling Pipes,will not be needed to complete Work on the project. CONTRACT TIME: The"Time for Completion", section#2 on page one of the Contract,required Work to be Substantially Complete within 125 working days of the effective date of Notice to Proceed,and Physically complete within 244 calendar days of the effective date of Notice to Proceed or by December 31,2017, whichever occurs first. 1 Special Construction Constraints section 1-08.4(2), as modified by Addendum#1, allows for the installation of mechanical screen equipment @ Lift Station#9, site restoration,paving and demobilization to occur after December 31,2017. The City of Everett modified the design of the screen vault structure and approved the manufactures screening equipment shop drawings on 10/19/17. This screening equipment has a 14 to 16 week lead time for manufacturing. Therefore the new screening equipment should be ready for installation by late January, or early February 2018. Forty Five(45) calendar days will be added to the contract time by this change order#1, which makes the new date for Physical Completion,February 14,2018. Page 4 of 4