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Based on the results of the first phase study, the second phase would involve field investigation <br /> work to inspect and evaluate the condition of the transmission pipe, the extent of corrosion, <br /> remaining pipe wall thickness and other condition attributes. This information will then guide <br /> development of a plan for recommended rehabilitation and replacement of the transmission main <br /> in the future. <br /> TKDA has assisted Arden Hills with past water main related work, including water main <br /> replacement along Trunk Highway 10 and the pressure reducing station rehabilitation for Arden <br /> Manor. TKDA has experience in evaluating larger diameter cast iron and ductile iron pipelines for <br /> the Metropolitan Council and other agencies. <br /> Budget Impact <br /> The draft 2021-2025 Capital Improvement Program reviewed by the City Council on July 20, 2020 <br /> identifies $65,000 for the Trunk Water Main Evaluation project, with funding derived from the <br /> City's water utility. The TKDA proposal provided in Attachment B identifies a consultant fee in <br /> the amount of$29,400 and includes a $5,000 allowance for subcontracting geotechnical field work <br /> to collect and analyze soil samples. Staff recommends approval of the professional services <br /> agreement with TKDA. <br /> Attachments <br /> Attachment A: Location Map <br /> Attachment B: TKDA Proposal <br /> Page 2 of 2 <br />