Title
Consider and take action on a resolution authorizing a professional services agreement with ARKK Engineers for the 2017 Sanitary Sewer Rehabilitation Project - Wastewater System Evaluation (WW1201A), in an amount not to exceed $417,967.94 (Director of Public Works)
Background:
Approval of this resolution will authorize a professional services agreement with ARKK Engineers to perform the Wastewater System Evaluation and Flow Monitoring Program as part of the 2017 Sanitary Sewer Rehabilitation Project (WW1201A).
This contract with ARKK Engineers will be the first project of a two-year program that will evaluate dry-weather and wet-weather sanitary sewer flows. This effort includes calibrated in-pipe flow monitoring at strategic locations throughout the collection system with follow-up field testing and investigation to determine which areas are contributing the highest amount of inflow and infiltration. This year’s flow monitoring program will encompass the entire City and the field testing and investigation will focus on the east side of the City where the City’s historically oldest sanitary sewer infrastructure exists. Phase two of the proposed evaluation will be presented to City Council for consideration of approval in FY 2018 for further field testing and investigation for the west side of the City.
A component of the City’s 2017 Water and Wastewater Master Plans Update includes a Wastewater System Analysis which requires integrating updated Flow Monitoring data for the entire City’s system into the wastewater collection model. This updated flow data will provide a much higher degree of accuracy to evaluate the influence of inflow and infiltration on the system to identify capacity deficiencies in the wastewater system. Projects that are required to correct capacity deficiencies will be included in the CRF Update Plan.
The information from the flow monitoring will provide data used to determine which areas to target for further field testi...
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