2016 Stormwater Management Manual Overview SWMM Team Ivy

2016 Stormwater Management Manual Overview SWMM Team Ivy Dunlap, Alice Coker, Henry Stevens and Emily Hauth, Bureau of Environmental Services

Presentation Overview • Schedule for 2016 Stormwater Management Manual (SWMM) • Quick SWMM primer • What’s new or clarified (per chapter) • Review of the new Presumptive Approach Calculator Environmental Services l 2016 Stormwater Management Manual Overview 2

What is the SWMM? • Provides developers and design professionals with specific requirements for reducing the impacts of stormwater from new development and redevelopment projects. • Private & Public property, including ROW that develop or redevelop > 500 square feet of impervious surface. • Meet Regulatory requirements • SWMM updated about every 2 years Environmental Services l 2016 Stormwater Management Manual Overview 3

2016 SWMM Schedule • April 4 – May 5, 2016 Public review & comment period. • July 20, 2016 Council adopted the proposed changes to PCC 17. 38 • August 19, 2016 - SWMM and Source Control Manual become effective. • November 21, 2016 – end date to use either 2014 or 2016 manuals. After this date only 2016 SWMM applies. Environmental Services l 2016 Stormwater Management Manual Overview 4

Revised and Improved SWMM Goals: • Reduce duplication and improve consistency throughout the document • Chapter 4 Source Controls is separate Administrative Rule – No changes to content at this time • Update user interface for Presumptive Approach Calculator Revisions: • Complete reorganization of the Appendices – Major restructuring of Chapter 1; consolidate all policy from Appdx A – Moved drainage reserves out of the Appendices – Typical details, submittal guides & plant list now Chapter 2 – Updated stormwater facility design criteria and typical details – Operations & M requirements per private or public facility • New look/New font - slimmer and easier to read Environmental Services l 2016 Stormwater Management Manual Overview 5

Chapter 1 – Requirements and Policies 1. 1. 3 Relationships to Other Requirements sections from through out the 2014 SWMM 1. 2. 3 Stormwater Retrofits 1. 2. 4 New Exemptions – Maintenance of existing culverts and water crossing structures – Soft surface trails in drainage reserves – Stand alone projects that consist solely of safety improvements Environmental Services l 2016 Stormwater Management Manual Overview 6

Port of Portland Stormwater Design Standards Manual (SDSM) • Potential Port of Portland areas exempt from the SWMM – Project is located within the airfield security fence – Discharges entirely to the Port System • contact Port of Portland staff to determine applicability of this exemption. Environmental Services l 2016 Stormwater Management Manual Overview 7

Chapter 1 – Requirements and Policies 1. 3. 1 & 1. 3. 7 Infiltration and Discharge Hierarchy – New Graphics Environmental Services l 2016 Stormwater Management Manual Overview 8

Under Ground Injection Controls (UIC) 1. 3. 3 Infiltration Requirements • Roof runoff AND pedestrian-only plaza areas can drain directly to UICs • Expand “Discharge to UIC” criteria to now include: – Residential streets (<1, 000 trips/day) – Residential driveways – Small parking lots (<50 spaces) – Spill control and additional pollution reduction-private systems will need lynch-style catch basin; public systems will need sedimentation manhole Environmental Services l 2016 Stormwater Management Manual Overview 9

Chapter 1 – Requirements and Policies • 1. 3. 4 Drainage reserve policy requirements moved from Appendix A. 3. – Not new but now integrated into stormwater conveyance requirements • 1. 6 Administrative Reviews and Appeals. – New bureau-wide process. – Request administrative review within 20 days of receiving a notification. • Reviewable: interpretation of items in Chapter 1. • Not reviewable: Technical standards in Chapter 2 & 3. Environmental Services l 2016 Stormwater Management Manual Overview 10

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 Environmental Services l 2016 Stormwater Management Manual Overview 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 11

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 1 Site Planning. . . . . . . 2 -4 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 Environmental Services l 2016 Stormwater Management Manual Overview 12

Chapter 2 2. 1. 2 Steps in the Design Process Environmental Services l 2016 Stormwater Management Manual Overview 13

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 Environmental Services l 2016 Stormwater Management Manual Overview 14

Chapter 2 Environmental Services l 2016 Stormwater Management Manual Overview 15

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 Environmental Services l 2016 Stormwater Management Manual Overview 16

Chapter 2 2. 3. 1 Types of Stormwater Facilities • Impervious Area Reduction • Vegetated Stormwater Facility • Subsurface Stormwater Facility • Other Stormwater Facility Types • Stormwater Conveyance Features Environmental Services l 2016 Stormwater Management Manual Overview 17

Chapter 2 2. 3. 2 Facility Configurations Flow-through Environmental Services l 2016 Stormwater Management Manual Overview 18

Chapter 2 2. 3. 2 Facility discharge Environmental Services l 2016 Stormwater Management Manual Overview 19

Chapter 2 2. 3. 3 Standard Landscape Requirements Facility specific requirements were removed. See 2. 3. 4 and details Environmental Services l 2016 Stormwater Management Manual Overview 20

Chapter 2 2. 3. 4 Design Criteria • Presumptive options for PAC only • Remove O&M • ROW vs. private property Setbacks: Setback requirements vary by location. Private property requirements: Infiltration swales are typically set back 5 feet from property lines and 10 feet from building foundations. There are no setback requirements for lined swales. See Table 2 -1 for more information on setbacks. Right-of-way requirements: If a basement is within 10’ of an infiltration swale, a partial liner may be required on the basement side of the swale. Environmental Services l 2016 Stormwater Management Manual Overview 21

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 3. 4. 5 Rain Garden. . . . . 2 -60 Environmental Services l 2016 Stormwater Management Manual Overview 22

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 Environmental Services l 2016 Stormwater Management Manual Overview 23

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 Environmental Services l 2016 Stormwater Management Manual Overview 24

Chapter 2 2. 3. 5 Typical Details Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 Environmental Services l 2016 Stormwater Management Manual Overview 25

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 Environmental Services l 2016 Stormwater Management Manual Overview 26

Chapter 2: Stormwater Facility and Conveyance Design 2. 1 Site Planning. . . . . . . 2 -4 2. 3. 5 Typical Details. . . . . 2 -146 Private Simplified Approach Typical Details (SW-100’s). . . . . 2 -147 Private Presumptive and Performance Typical Details (SW-200’s). . . 2 -157 Green Street Typical Details (SW-300’s). . . 2 -175 2. 3. 6 Infiltration and Soil Requirements. . . 2 -212 Depth to Groundwater Investigation. . . . 2 -212 Infiltration Testing. . . . . 2 -218 Blended Soil Specification for Vegetated Stormwater Systems. . 2 -229 2. 1. 1 Design Goals. . . . . . 2 -4 2. 1. 2 Steps in the Design Process. . . . 2 -6 2. 2 Sizing Methodologies. . . . . . 2 -18 2. 2. 1 Simplified Approach. . . . . 2 -21 2. 2. 2 Presumptive Approach. . . . . 2 -22 2. 2. 3 Performance Approach. . . . . 2 -25 2. 3 Stormwater Facility and Conveyance Design. . . 2 -29 2. 4 Submittal Requirements. . . . . 2 -230 2. 3. 1 Types of Stormwater Facilities and Conveyance Features. . . 2 -29 2. 3. 2 Stormwater Facility Configurations. . . 2 -30 2. 3. 3 Standard Landscape Requirements. . . 2 -36 2. 3. 4 Facility and Conveyance Design Criteria. . . . . 2 -41 2. 3. 4. 1 Ecoroof. . . . . . 2 -43 2. 3. 4. 2 Pervious Pavement. . . . 2 -49 2. 3. 4. 3 Tree Credits. . . . . 2 -53 2. 3. 4. 4 Downspout Extension. . . . 2 -57 2. 3. 4. 5 Rain Garden. . . . . 2 -60 2. 3. 4. 6 Swales. . . . . . 2 -64 2. 3. 4. 7 Curb Extension. . . . . 2 -70 2. 3. 4. 8 Planters. . . . . . 2 -79 2. 3. 4. 9 Basins. . . . . . 2 -85 2. 3. 4. 10 Filter Strips. . . . . 2 -91 2. 3. 4. 11 Grassy Swales. . . . . 2 -94 2. 3. 4. 12 Ponds. . . . . . 2 -99 2. 3. 4. 13 Sand Filters. . . . . 2 -109 2. 3. 4. 14 Soakage Trenches. . . . 2 -112 2. 3. 4. 15 Drywells. . . . . 2 -117 2. 3. 4. 16 Sumps. . . . . . 2 -122 2. 3. 4. 17 Manufactured Stormwater Treatment Technologies. . . 2 -127 2. 3. 4. 18 Rainwater Harvesting. . . . 2 -129 2. 3. 4. 19 Structural Detention Facilities. . . 2 -131 2. 3. 4. 20 Drainageways and Drainage Reserves. . . . 2 -136 2. 3. 4. 21 Drainage Reserve Encroachments. . . . . 2 -140 2. 3. 4. 22 Channel Encroachments. . . . 2 -143 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 2. 4. 2 Land Use Submittal Requirements. . . 2 -245 2. 4. 3 Simplified Approach Submittal Requirements. . . . 2 -248 Simplified Approach Form. . . . 2 -252 2. 4. 4 Presumptive Approach Submittal Requirements. . . 2 -254 2. 4. 5 Performance Approach Submittal Requirements. . . 2 -255 2. 4. 6 Stormwater Report Submittal Requirements. . . . 2 -257 2. 4. 7 Drainage Reserve and Encroachment Submittal Requirements. . . 2 -260 2. 4. 8 Manufactured Stormwater Treatment Technology Submittal Requirements. . . . 2 -265 Manufactured Stormwater Treatment Technology Application and Renewal Form. . . 2 -273 2. 4 Submittal Requirements. . . . . 2 -230 2. 4. 1 Landscape Submittal Requirements. . . 2 -230 Tree Credit Worksheet. . . . 2 -243 Environmental Services l 2016 Stormwater Management Manual Overview 27

Chapter 2 2. 4 Submittal Requirements • Plant lists • Tree worksheet Environmental Services l 2016 Stormwater Management Manual Overview 28

Presumptive Approach Calculator (PAC) Environmental Services l 2016 Stormwater Management Manual Overview 29

Presumptive Approach Calculator (PAC) • Portland Online account required – Save projects, export/import • Real time calculations (no buttons) • Incorporate hierarchy workflow into calculator (pre/post peak matching) – No need to run the PAC twice – Helps reinforce infiltration and discharge hierarchy Environmental Services l 2016 Stormwater Management Manual Overview 30

Environmental Services l 2016 Stormwater Management Manual Overview 31

Environmental Services l 2016 Stormwater Management Manual Overview 32

Presumptive Approach Calculator (PAC) Environmental Services l 2016 Stormwater Management Manual Overview 33

Chapter 3 – O&M Private Property • Public and private O&M requirements are broken out separately. • The standard O&M plans are for Simplified and Presumptive approaches. • All of the conveyance features - drainageways, culverts, outfalls - have standard O&M plans. Environmental Services l 2016 Stormwater Management Manual Overview 34

Chapter 3 – O&M Private Property Environmental Services l 2016 Stormwater Management Manual Overview 35

Chapter 3 – O&M Private Property Environmental Services l 2016 Stormwater Management Manual Overview 36

Chapter 3 – O&M Private Property Environmental Services l 2016 Stormwater Management Manual Overview 37

Chapter 3 – O&M Green Street Facilities • There is now a standard O&M Plan for contractors providing the first two years of maintenance. • The O&M form for GS facilities has been revamped to make the process more straightforward for all parties. Environmental Services l 2016 Stormwater Management Manual Overview 38

Chapter 3 – O&M Green Street Facilities Environmental Services l 2016 Stormwater Management Manual Overview 39

Chapter 3 – O&M Green Street Facilities Environmental Services l 2016 Stormwater Management Manual Overview 40

QUESTIONS? Environmental Services l 2016 Stormwater Management Manual Overview 41

Find the 2016 SWMM online: www. portlandoregon. gov/bes/SWMM Email Questions or Comments: BESstormmanual@portlandoregon. gov SWMM Team: Ivy Dunlap, Alice Coker, Emily Hauth, and Henry Stevens Environmental Services l 2016 Stormwater Management Manual Overview 42