E 10918 Columbia Slough Outfall 57 KickOff Meeting

E 10918 Columbia Slough Outfall 57 Kick-Off Meeting Henry Young, Project Manager City of Portland Environmental Services August 30 th, 2017

Meeting Agenda • Welcome • Project Team – Introduction • Background – Project Summary – Regulatory History – Sediment Program Goals • • Project Overview Project Consideration & Issues Design Approach House-keeping – – Project Work Codes Budget Schedule Project Communication and Team Meeting • Questions & Discussion Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 2

Project Team CS N 2 R Program Member Name Work Group Project Role Patty Nelson Surface Water Eng CIP Lead, Peer Review Nancy Hendrickson CS Watershed Mgr CS N 2 R Program Lead Rod Struck CS Watershed Sediment Program Mgr Core Team Henry Young Surface Water Eng Project Manager Julie Matney CS Watershed Project Sponsor Kate Hibschman Stormwater Implementation Green Street Design Debbie Caselton Public Involvement TBD Construction Manager Stephen Hawkins Maintenance Eng Maintenance Technical Support Jim Wood Material Testing Geotechnical Engineer Taryn Meyer Coordinated Site Analysis Environmental Binhong Wu Asset System Management Modeling Alan Kuma PBOT Survey Jeremy Person Watershed Reveg Planting John Lamont Surface Water Eng CADD Tech * Others as needed based on scope and resources Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 3

Background: Project Summary • Provide stormwater treatment within Outfall Basin 57 • OF 57 is one of over 200 MS 4 outfalls discharging to the Columbia Slough • One of a series of projects to treat stormwater within Slough outfall basins Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 4

Background: Regulatory History • Columbia Slough sediments contain elevated contaminant concentrations § PCBs § Metals § Pesticides § Other widely used organic compounds • 1993 DEQ Consent Order § Required City to investigate and clean up sediment contamination • 2005 DEQ Record of Decision § Requires City (and other responsible parties) to address Slough-wide sediment contamination • IGAs between City and DEQ § Identify & control contaminated stormwater runoff from upland sites § Treat stormwater runoff from City rights-of-way § Long-term monitoring Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 5

Background: Sediment Program Goals • Improve sediment & water quality – Support PWMP and MS 4 compliance – Enhance critical habitat for ESA-listed salmonids – Reduce exposure from ingesting fish • Maintain regulatory compliance – Avoid prescriptive enforcement • Prevent recontamination – Post in-water cleanup • Pursue No Further Action – Limit future liability Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 6

Project Overview Columbia Slough OF 57 • Delineated drainage area – 117. 3 acres – 35. 2 acres from R/W – 5. 5 acres N Columbia Blvd • Proposed Predesign Treatment Facilities – Green Street Facilities – Swale/Basin – Filter Vaults • Initial Project Budget – $4. 12 million Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 7

Project Consideration and Issues • Challenges – N Columbia Blvd (5. 5 acres) • • Traffic impacts Limited Right-of-Way Construction challenges Difficult operation and maintenance – Railroad adjacent to Columbia Blvd – Dedicated Bike Lanes on Portsmouth and Fessenden – WWTP Master Plan • Coordination with proposed WWTP expansion • Challenges if encroach into railroad Right-of-Way • Permit and schedule impact – Controlled Combined Sewer Outfall • Proposed swale in pre-design, problematic without separator Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 8

Design Approach • Alternative Analysis – Design Options • • • Green Street Swale UIC Filter Catch Basin Filter Vaults – Guiding Principles • Maximize stormwater treatment • Use planting/green street facilities where possible • Minimize loss of parking • Minimize tree removal • Ease of construction • Ease of operation and maintenance • Minimize utility conflicts Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 9

House-Keeping • Project Charges – Type of Work (TOW) Codes • Current Phase – Predesign (P. __) Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 10

House-Keeping: Communication & Team Meetings • PM main point of contact • Copy PM and pertinent team members with any communication relating to Project • Initial monthly meetings Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 11

House-Keeping: Schedule Phase TOW Start Date End Date 30% Design P. __ August 2017 December 2017 60% Design D. __ January 2018 May 2018 90% Design D. __ June 2018 September 2018 Final Design D. __ October 2018 February 2019 Construction Bidding A. __ March 2019 June 2019 Construction C. __ July 2019 February 2020 Closeout S. __ March 2020 February 2021 Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 12

Questions & Discussion Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 13

Thank you!

Background: Project Objectives • Treat 90% of the average annual runoff • Treat 100% of City ROW * Several low-traffic residential streets are not being treated with this project, due to estimated low pollutant loading • Treatment opportunities identified in 2013 Pre-Design are implemented OR Alternate stormwater solutions are applied, but deliver the same or better treatment of runoff Environmental Services | E 10918 Columbia Slough Outfall 57, Kick-Off Meeting 18