| 2019 to 2020 | $15 million | Salmon Creek Solids Handling Project.
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| 2018 to 2019 | $900,000 | Beverly Park District Extension.
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| 2016 to 2018 | $15 million | Purchase of land, design and construction of new Administration and Maintenance Facility.
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| 2017 | $2.6 million | Rehabilitation of Pump Stations #14 and #15.
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| 2016 | $175,000 | Pump Station #7 improvements.
(Slip-lined Station force main.)
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| 2015 to 2016 | $1.2 million | MCP digester repairs and improvements and a new dewatering devise.
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| 2013 to 2014 | $3.3 million | MCP/SCP plant improvement primary clarifier, chlorine contact chamber and safety improvements.
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| 2013 | $400,000 | Updated District Comprehensive Sewer Plan, which includes the first District basin study & system hydraulic model.
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| 2013 | $550,000 | 152nd Alleyway Rehabilitation Project.
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| 2011 | $150,000 | SCP headwork’s improvement. Made improvements to headwork’s screens and by-pass channel to better handle peak high flows caused by heavy rain events.
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| 2010 to 2011 | $400,000 | MCP/SCP Disinfection upgrades. Replaced 20-year-old Sodium.
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| N/A | N/A | Hypochlorite (NaOCl) generators with modern, efficient and dependable generators. Staff installed equipment, saving tens of thousands of dollars.
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| 2010 | $300,000 | 3rd Ave. South - District Extension. Several failing septic systems. Health Department had tagged a few of the houses. Approximately 20 homes.
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| 2009 to 2010 | 1.3 million | Pump Station #2 upgrade. Completely new pump station. New wet well, pumps, controls building. Needed slightly bigger station due to Evergreen heights and Greenbridge expansion.
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| 2009 | $300,000 | MCP Clarifier improvements. Replaced all flights, chains, sprockets and drive motors for two primary clarifiers.
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| 2009 | $300,000 | SCP Centrifuge. Improved dewatering from 16% to 22% solids. Handles more Gallons Per Minutes (GPM). Hauling fewer solids to Eastern Washington due to higher concentration of solids. Added dewatering redundancy.
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| 2010 to 2012 | $2.5 million | Seahurst Beach Project –Installation of new pump station, replacement of nearly 5,000 feet of beach sewer line, piping improvements of an existing pump station. Working with the City of Burien, Army Corps of Engineers, and Department of Ecology & Department of Fisheries on an environmental shoreline improvement project.
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| 2007 to 2011 | $4.6 million | Chelsea Park Project – Replaced over 64,000 feet of old sewer lines and a few hundred stubs in the heart of Burien. Improved treatment plant capacity, hydraulic loading on the sewer collection system and longevity of the sewer pipe.
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