Estimated Completion: March 2027
The e2i2 Project is currently In Progress. Contractors are actively working on the infrastructure upgrades and the City estimates that the project will be complete by March 2027.
e2i2 Project
Historically, Chattanooga's wastewater infrastructure has lacked the necessary storage capacity to handle surging volumes during heavy rain events. This deficit frequently resulted in sanitary sewer overflows at various manholes across the city and, until 2023, led to direct discharges into the Tennessee River. To definitively address this challenge, the city is constructing major equalization stations. These vital facilities are designed to create an essential buffer, mitigate the risk of surface overflows, and actively balance the volume of water moving throughout the municipal network. During severe weather, the stations temporarily capture and hold the massive influx of wastewater mixed with unwanted stormwater infiltration, preventing the broader system from becoming overwhelmed. Once peak flows subside and pipeline capacity is restored, the stored water is safely and systematically conveyed to the Moccasin Bend Environmental Campus for comprehensive treatment.
The project encompasses constructing two massive wet weather equalization stations capable of safely storing approximately 40 million gallons of excess wastewater during intense rain events. Backed by a total estimated budget of $153.7 million for both facilities, this initiative is as much an economic driver as it is an environmental safeguard. Beyond protecting local waterways and public health, the project is projected to generate $39 million in direct local investment, creating and supporting crucial jobs throughout the region.
Project Highlights
- Prevent Overflows and River Discharges: Solves the city's historic lack of storage capacity by stopping sanitary sewer overflows at manholes and preventing direct wastewater discharges into the Tennessee River.
- Capture Heavy Stormwater Influx: Uses two massive wet weather equalization stations to temporarily capture and store up to 40 million gallons of excess wastewater and stormwater infiltration during severe rain events.
- Balance the Municipal Network: Creates a vital buffer that prevents the broader sewer system from becoming overwhelmed during peak storm flows.
- Safely Manage and Treat Water: Systematically releases the stored water to the Moccasin Bend Environmental Campus for comprehensive treatment once pipeline capacity is restored
- Protect Public Health and Waterways: Safeguards local ecosystems, protects public health, and shields local waterways from contamination.
- Drive Economic and Job Growth: Fuels the regional economy by generating substantial direct local investment and supporting crucial jobs throughout the area.
Project Timeline
Project Budget
The budget for the e2i2 Project, including the construction of two wet weather equalization stations that are projected to generate $39 million in direct local economic investment, is estimated at $153.7 million.
Chattanooga's e2i2 wastewater project along Interstate 75 generates $39 million in local economic impact, supporting local jobs and regional businesses.
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