2018 Sanitary Sewer Infiltration Reduction Project

Letter sent to property owners & residents affected by the project

Notice of Construction

image - front yard sewer configuration

The City of Arcata has contracted with G.R. Sundberg Construction for the 2018 Sanitary Sewer Infiltration Reduction Project. Inflow and infiltration (I&I) is the intrusion of external water into the closed sanitary sewer network via defects and damage to the system; inflow is the immediate intrusion of storm water, and infiltration is the slower "seeping" of groundwater into manholes and sewer lines. The additional water volume resulting from I&I can be significant, and frequently causes inundation of sewer lines resulting in sanitary sewer overflows (SSO's), and the operation of the wastewater treatment plant at or above its designed limits.

image - sewer lateral connection rehab
Rehabilitation of a Sewer Lateral Connection (Section Image)

This project is intended to reduce the rate of infiltration and exfiltration of the City's sanitary sewer system. The majority of the work consists of cured-in-place pipe lining (CIPP) or replacing sewer lines and laterals in the City where the sanitary sewer system was constructed using short lengths of vitrified clay pipe whose joints have failed over time in our seismically active area. CIPP is a trenchless technology that inverts an epoxy impregnated sock along the inside of the pipe which is then expanded and heat cured. During the curing process there will be an off-gassing of chemicals that people find offensive in miniscule quantities. If you notice a strong odor in your residence it means one of your odor/p traps is not functioning. Plug the offending drain and ventilate residence, the smell should dissipate shortly.

image - sewer mainlining
Re-Lining of City Sewer Mainlines

The 2018 Sanitary Sewer Infiltration Reduction Project has been a long term goal for the City of Arcata as it is vital to maintaining Arcata’s core infrastructure. The City is thrilled to begin making these improvements for our community. Upon completion, this project will reduce the amount of wastewater that is processed through Arcata's wastewater treatment facility greatly reducing the possibility of sanitary sewer overflows and lowering operating costs.

Funding for this project has been provided in full or in part by Proposition 1 - the Water Quality, Supply, and Infrastructure Improvement Act of 2014 - and the Clean Water State Revolving Fund through an agreement with the State Water Resources Control Board. California's Clean Water State Revolving Fund is capitalized through a variety of funding sources, including grants from the United States Environmental Protection Agency and state bond proceeds. The remaining cost plus contingencies will be funded using capital reserves which have been accumulating in the City's Wastewater Fund for the purpose of funding major infrastructure improvements. In anticipation of financing major capital projects, the City Council increased water and wastewater rates over a five-year period which will be used to cover the cost of major capital improvements to the City's 50+ year old infrastructure. 

Due to the work required for this project, neighborhood residents in construction zones may experience brief sewer and water service interruptions. The City of Arcata will notify effected property owners, businesses and tenants serviced by the sewer mains selected for rehabilitation by mail. 72 hours in advance of these interruptions door hangers will be placed notifying of impending sewer and water service interruptions. It is anticipated that residents effected will have several minor service interruptions through the duration of this project. Construction for this project should be completed by Fall 2019.

The City of Arcata apologizes for any inconvenience that this project may cause to neighborhood residents, and thanks community members in advance for their cooperation. On the days of scheduled work, community members are advised to follow all directions and traffic control devices within the construction area.

If problems are encountered with this project, please contact G.R. Sundberg Construction at 707- 825-6565 or the City of Arcata at 707-825-2173.

image - State Revolving Fundimage - EPAimage - Prop 1Bimage - CA Water Boards