This presentation characterizes the historic basis of the City of Port Angeles' Combined Sewer Overflows (CSOs) problem, and the solutions to fix it.
Each city's infrastructure, historically developed differently, has different geographical and geological conditions, are in different economic straits, and each must be evaluated for which solution will work best for that community.
We often read in the press that this is the most expensive project ever undertaken in the city's history, with little emphasis on the elegant, efficient, and economical engineering accomplishment that Brown and Caldwell has created in developing the current CSO designs.
I am certain that this project's estimated cost of just under $40 million feels extremely burdensome to the citizens of Port Angeles, and should not be taken lightly. However, the project's approach is truly the most inexpensive way to solve the problem, which we will show in this presentation.
Notification & Posting
As part of its public outreach effort, the City of Port Angeles has posted warning signs at CSO locations and at public water access areas nearby.
The signs warn people to avoid contact with the receiving waters during and following heavy rain, and include a local telephone number and website address where the public can obtain more information about CSOs.
Vicinity public agencies are notified during each CSO event by the City of Port Angeles Public Works Department. These agencies are the Washington Department of Ecology, Washington Department of Health, Washington Department of Fish and Wildlife, Washington Department of Natural Resources, Clallam County Health Department, Port of Port Angeles, and Lower Elwha Klallam Tribe.
Reduction Plan & Projects
Under Washington law and administrative regulations, cities with CSOs are required to adopt a written plan for reducing their CSOs. The Port Angeles CSO Reduction Plan has been recently updated, and has been approved by the Department of Ecology.
In accordance with its approved CSO Reduction Plan, the City of Port Angeles is on schedule to design and build projects to bring CSOs under control. In 2012, the city started construction. For details, visit the CSO Construction page.
Construction of the Phase 1 projects began August, 2012. The work includes a large sewer main between Francis Street Park and the wastewater treatment plant, in order to control discharges from CSO 10. Also, a 5 million gallon storage tank will be retrofitted, and the industrial outfall formerly operated by Rayonier will be placed into service. Improvements within the treatment plant are included, and force mains from downtown to the treatment plant will be constructed.
Phase 2 includes replacement of pump station four (located along Marine Drive), constructing a new sewer main between Lincoln Street and the new pump station, and connecting the pump station to the force mains constructed during Phase 1. Construction of Phase 2 is scheduled for 2015 and 2016. Once the system is operational, Port Angeles will meet the Washington Department of Ecology "controlled" level of not more than one discharge per year, per outfall, on average. Pollution to Port Angeles Harbor will be greatly reduced.
Port Angeles is on schedule to control its CSOs by the end of 2016.
Six of the original ten CSO discharge points were eliminated before 2005. See map for details.