Professional Services Agreement - Arcadis US Inc - Rehab of Raw Sewage Pump No 2

Home Browse Search

INTER -OFFICE MEMORANDUM DEPARTMENT OF PUBLIC WORKS DIVISION OF UTILITIES TO: Members of the Board of Public Works Eric Horvath, Director of Public Works Kara Boyles, City Engineer Clara McDaniels, Board of Public Works Attorney FROM; Al Greek, Director of Utilities Jacob M. Klosinski, Assistant City Engineer SUBJECT: Agenda Request Form — Professional Services Agreement WWTP Raw Sewage Pump No. 2 Rehabilitation DATE: August 21, 2018 The Department of Public Works Division of Utilities is requesting the Board of Public Works approval of a Professional Services Agreement with Arcadis U.S., Inc. to provide professional engineering services to provide design specifications for the rehabilitation of the Wastewater Treatment Plant Raw Sewage Pump No. 2. Background Over time Raw Sewage Pump No. 2 has exhibited a loss in pumping capacity. The current pump and impeller is rated for 50 MGD. Over recent years full output of the pump has varied between 45 — 48 MGD depending on the head conditions at the adjacent wet well and incoming sewage flow rates. Both Raw Sewage Pump No. 1 and Pump No. 3 are capable of 50 - 55 MGD flow rates. They were both rebuilt in recent years and each has a larger impeller. A similar rehabilitation is scheduled for Raw Sewage Pump No. 2. Raw Sewage Pump No. 2 was recently inspected and overall, the condition of the volute is in good to fair condition. The pump does not require a complete replacement but it does require rehabilitation so it can continue to provide the pumping capacity needed for normal permitted flows. This project is part of the Wastewater Treatment Plant's capital budget for 2018. This project will be bid early in the fourth quarter with the intent to award the project prior to year's end. The funding source for the Professional Services Agreement is Utilities, Sewage Works 1 Wastewater Engineering, Account (641-0630-793-31-02). If there are any questions regarding the subject project, please contact Al Greek (Ext. 4210) or Jacob M. Klosinski (Ext. 9496) at the Division of Utilities.