Broken Arrow Municipal Authority
Meeting of: 09-04-2018
Title:
title
Approval of and authorization to execute Amendment No. 1 to the Professional Consultant Agreement with HDR Engineering, Inc. for assistance during construction for the Verdigris River Water Treatment Plant Pretreatment Basin Expansion (Project No. 175436)
End
Background:
HDR Engineering, Inc. (HDR) was retained by the Broken Arrow Municipal Authority to provide design services for the Verdigris River Water Treatment Plant (VRWTP) Pretreatment Basin Expansion project. Once constructed and placed in service, this project will expand the total pretreatment basin capacity to 30 million gallons per day and allow the pretreatment trains to be operated at lower loading rates during high algae counts and particulate loading in the raw water, which will result in improved settled water quality needed for optimum membrane filtration operation.
The improvements project consists of the construction of two (2) rapid mix basins, two (2) train flocculation basins with plate settlers, a residual collection and pumping system, modifications to the chemical feed storage and pumping system, and all appurtenances. Although not required for this project, it was determined that it would be advantageous to add the replacement of two chemical storage tanks at the VRWTP into the construction of this project (the award of the construction contract is a separate agenda item).
The original design contract with HDR included some assistance during construction and project closeout services. This Amendment No. 1 will provide additional HDR assistance for the administration of the construction contract, increased HDR representation for site observation visits and at construction meetings, increased time for HDR review of Requests for Information, Field Orders, Change Orders, Work Change Directives, shop drawing submittals, on-site assistance for p...
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