Explanation
1. BACKGROUND
This Ordinance authorizes the Director of Public Utilities to renew and increase the professional engineering services contract with DLZ Ohio, Inc. for the Lower Olentangy Tunnel project, CIP 650724-100000, in an amount up to $1,884,000.00, to fund year three of the contract for services needed during construction.
The proposed Lower Olentangy Tunnel will work in tandem with the four pillars of the Blueprint Columbus program to enable the City to address several elements of its sewer consent orders that the four pillars alone cannot address and will also improve water quality in the Olentangy River. The project will provide hydraulic relief to both the Franklin Main Interceptor Sewer and the Olentangy Scioto Interceptor Sewer near Second Avenue and near Lane Avenue; it will control the seven upper Olentangy combined sewer overflows per the consent order; mitigate the activation of four designed sewer relief structures per the consent order; and allow closure of a fifth designed sewer overflow structure. This contract renewal will fund the continuation of design services through plan signature, engineering services during construction bidding and approximately six months into construction.
Work completed to-date under this contract:
• The original contract included the review of existing information, preliminary field investigations, preliminary geotechnical investigation, and a preliminary design report.
• Renewal No. 1 included a large portion of the detailed design, final geotechnical investigation, and survey and easement preparation.
• Renewal No. 2 included completion of detailed design, production of specifications, and bidding related services.
• Renewal No. 3 included engineering services during construction for the first year.
• Renewal No. 4 included the continuation of engineering services during construction for ...
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