E 10918 Columbia Slough Outfall 57 Team Meeting

E 10918 Columbia Slough Outfall 57 Team Meeting Henry Young, Project Manager City of Portland Environmental Services January 19 th, 2018

OF 57 Meeting Agenda • • • • Welcome Meeting Agenda Project Team Project Overview Project Update Ranking Input Sheet Recommended Alternative, Alt 2 -Green Streets, UICs & Filter Cart (Vault/CB) Not Selected, Alternative 1 -Green Streets, & Filter Cart (Vault/CB) Flaw, Alternative 3 -Regional Facility with UICs Flaw, Alternative 4 -End of Pipe: Stormwater Wetland Ranking Input Sheet Question and Discussion Next Meeting Feb 21, 2018 Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 2

OF 57: Project Team CS N 2 R Program Member Name Work Group Project Role Tammy Cleys 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/Casey Cunningham Stormwater Implementation Green Street Design Debbie Caselton Public Involvement Brad Huard Cedar Nickels Construction Manager Inspector 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 * Others as needed based on scope and resources Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting CADD Tech 3

OF 57: Project Overview Columbia Slough OF 57 • Provide water quality treatment of stormwater prior to discharging into Slough • 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 – Filter Vaults – Swale • Initial Project Budget – $4. 12 million Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 4

OF 57: Project Update • Survey Update – Columbia Blvd – N. Fessenden, N. Cecilia & N. Newark – Additional survey • Modeling – Field inventoried and verification of the residential roof drains to street – Reran Model with the finding – Result: Water quality or 10 -year peak flows either reduced or remained the same as prior model run • WWTP Master Plan – Regional Facility Incorporated onto Master Plan Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 5

OF 57: Project Update - Survey • Segment completed Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 6

OF 57: Project Update - Modeling • Flow same or up to 0. 7 cfs lower – Field Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 7

OF 57: Project Update – WWTP Master Plan • Incorporated Regional Facility into WWTP Master Plan Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 8

OF 57: Ranking Input Sheet Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 9

OF 57: Recommended Alternative, Alt 2 – Green Streets, UIC, & Filter Cart (Vault/CB) Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 10

OF 57: Recommended Alternative, Alt 2 – Green Streets, UIC, & Filter Cart (Vault/CB) Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 11

OF 57: Recommended Alternative, Alt 2 – Green Streets, UIC, & Filter Cart (Vault/CB) Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 12

OF 57: Recommended Alternative, Alt 2 – Green Streets , UIC, & Filter Cart (Vault/CB) Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 13

OF 57: Not Selected, Alt 1 – Green Streets , & Filter Cart (Vault/CB) Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 14

OF 57: Flaw, Alt 3 – Regional Facility with UIC Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 15

OF 57: Flaw, Alt 3 – Regional Facility with UIC Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 16

OF 57: Flaw, Alt 4 – End of Pipe, Stormwater Wetland Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 17

OF 57: Flaw, Alt 4 – End of Pipe, Stormwater Wetland Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 18

OF 57: Ranking Input Sheet Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 19

OF 57: Questions & Discussion • 30% Plan, March/April 2018 • Evaluate utility conflicts and utility notification Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 20

OF 57: Next Meeting • Next Meeting: February 21, 2018 Environmental Services | E 10918 Columbia Slough Outfall 57, Team Meeting 21

Thank you!