West Fargo/Fargo Wastewater Connection Project
The City of West Fargo wastewater system currently consists of a series of ten lagoon cells covering 600 acres of land with 460 acres of actual treatment area (440 million gallons allowable storage volume). The lagoons are near hydraulic capacity and current organic loading grossly exceeds the capacity of the primary cells (pond #1 and #3). The deficiency in treating organic material magnifies operational issues such as odor, in which the city has seen an increase in complaints in recent years as the community has grown.
The City of West Fargo decided to address current and future capacity demands by coordinating an agreement with the City of Fargo. This agreement states that West Fargo can send 100% of their wastewater flow to Fargo providing the ability to decommission the existing lagoon system.
Based on the agreement, West Fargo is responsible to install a conveyance system that will deliver its wastewater to a connection point at 19th Avenue North and 9th Street NE. Fargo will be installing the necessary collection and metering system to this location with a design capacity to accommodate West Fargo’s future demands, which are 6.5 million gallons per day (average) and 14 million gallons per day (peak).
The City of West Fargo needs to convey the flows from the Northside Regional Lift (SA40) to the connection point which is nearly 3 miles away (approximately 1 mile north and 2 miles east). The proposed project may consist of a combination of force main and gravity pipe. The City has requested that the following information be investigated as part of this report:
- Evaluate multiple pipeline routes
- Redundancy in system for force mains
- Upgrade existing SA40 or replace lift station
- Accommodate future growth
- Provide a comparison matrix for alternatives
Estimated Construction Cost
- $5 million
Estimated Special Assessments
- Start Date: August 2018
- End Date: October 2019
- Project Completion: 90%
- Directional boring
- Forcemain installation
- Install maintenance manhole equipment
- Waiting on 408 permit for tie-back levee work
- Manhole valves
- Venting and piping
- Levee bore/casing
- Intermittent traffic control
Following the connection to Fargo, the City of West Fargo will decommission the lagoons over time, which will reduce sewage odors.
2018: Begin construction of 3-mile force main.
2019: Complete construction and begin sending sewage to Fargo
2020-2025: Continue lagoon decommissioning process
Goal of completely decommissioning all lagoons by 2025