City Council Meeting Date: June 8, 2021
To: Mayor and City Council
City Administrator
From: Justin Wagner, Utilities Manager
David Bennett, P.E., Public Works Director/City Engineer
Title
Discussion of the Wastewater Treatment Plant's Facility Study Update.
Body
Action Requested:
The Northfield City Council discusses the Wastewater Treatment Plant's Facility Plan Update.
Summary Report:
On August 5, 2019, the City of Northfield hired Jacobs Engineering Group (Jacobs) to provide the following services as part of the contract:
1) Phase 1 - Operations Assessment, previously presented to Council
2) Phase 2 - Condition Assessment - previously presented to Council
3) Phase 3 - Facility Plan (Attachment 1) - current discussion tonight with Council
Tonight's discussion is an update of the Facility Plan. As part of the Facility Plan, Jacobs Engineering Group updated the Wastewater Treatment Plant's Facility Plan from 2016. The objectives of this Facility Study update included:
1) Review and update projected flows and loads to 2040.
2) Review the 2016 Facility Plan improvement alternatives, document the updated status of improvements that have already been completed, and identify additional improvement alternatives that were uncovered as part of the Operational Assessment and Condition Assessment. Provide updated cost estimates for updates and revisions that are identified.
3) Review the 2016 Facility Plan project costs and provide updated cost summaries based on the status of improvements that are already completed and the updates and revisions identified for this Facility Plan Update.
As part of the flows and loads projections through 2040, the following plant influent load projections were identified in Table 2-5 of the Facility Plan Update which is listed below.
Table 2-5. Design Capacity and Projected Flows and Loads
Item
Original/Permitted Design Basisa
Updated Design Basisb
2025
2030
2035
2040
Population
23,228
24,174
25,155
26,177
AWW Flow (m...
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