Portland’s New Ecoroof Requirement: New Design and Maintenance Strategies @ DOWA – IBI Group
Oct 9 @ 5:30 pm – 7:00 pm
Portland’s New Ecoroof Requirement: New Design and Maintenance Strategies @ DOWA – IBI Group | Portland | Oregon | United States

As of July 9, 2018 Portland’s new Central City zoning code will require all new buildings of 20,000 sf or more to install ecoroofs. After 22 years, since the first ecoroof was installed on a Portland residential garage, the city has enacted one of the most comprehensive Ecoroof (Greenroof) mandates in the United States. This was no easy decision, yet after many years and the construction of more than 600 ecoroofs the city had the experience and confidence to pursue such a requirement. Tom Liptan, FASLA, Green Infrastructure Consultant and former Portland Ecoroof Program Technical Manager will discuss ecoroofs in detail beginning with a look at some of Portland’s first ecoroofs and concluding with a discussion on innovative ecoroof strategies.

The presentation will highlight the following topics:
· Portland’s first ecoroofs installed in late 1990s and early 2000s and the most pertinent lessons
· Development of the industry through to today, with attention to pertinent successes and bumps in the road related to architecture and ecoroof design
· New ecoroof techniques for design and O&M that are proving cost effective and durable, especially as these techniques apply to the city’s new ecoroof requirement
· Emerging and innovative green infrastructure techniques

More information: HERE.

Please register to attend: HERE.

The Care and Management of Mature Trees in an Urban Setting (Eugene, OR)
Oct 11 @ 12:00 pm – 1:00 pm

This lecture is being approved by the Oregon Chapter of ASLA for 1.0 Health, Safety and Welfare PDH for Oregon Registered Landscape Architects.

Scott Altenhoff – Urban Forestry Management Analyst, City of Eugene – Parks and Open Space

Oregon Electric Station
27 East 5th Avenue, Eugene 97401

There is a set menu – please email for more information.
We are fortunate to have Brad Graham from TripStop sponsoring this event. All of the meals are free of charge!

This presentation will explore some of the unique characteristics of older trees and the considerations involved with caring for them in an urban setting. Just as older people have distinct characteristics and health management needs, so do older trees. This talk will highlight some of the techniques and technologies that can be employed to maximize the health & benefits of older trees and minimize their costs & liabilities. Numerous case studies and local examples of older trees in Eugene will be discussed and showcased.

1) Provide audience with an understanding of how older trees differ from younger trees in terms of their form, function, value, benefits, liabilities and management needs.

2) Provide audience with an appreciation of why older trees are often worth preserving/ investing resources in rather than removing and replacing them

3) Provide audience with an understanding of some of the specific techniques/technologies that can be utilized to preserve and manage older trees

Scott Altenhoff is the Management Analyst for the City of Eugene’s Urban Forestry Program. Scott has been working as a municipal arborist/urban forester for the City since 2005. Prior to that, he worked for 13 years as a commercial arborist and forest surveyor, based in Eugene but working throughout the Pacific Northwest. Scott has a longstanding passion for big, old trees and the wide variety of organisms that depend on them. In 2004, he co-founded the Pacific Tree Climbing Institute in an effort to raise public awareness about the importance of trees and old-growth forests. For several years, Scott taught courses in Beginning and Advanced Arboriculture at Linn-Benton Community College. Scott received a B.A. in Classics (Latin, Greek, and Ancient Philosophy) from the University of Oregon, and is currently working on a graduate certificate in Urban Forestry through Oregon State University. Scott is an International Society of Arboriculture (ISA) Board Certified Master Arborist, Municipal Specialist, and Qualified Tree Risk Assessor and currently serves as a board member with the Society of Municipal Arborists (SMA).


This event generously sponsored by Tripstop

Continuing Education Fall 2018 Workshop: Successful Integration of Landscape Architecture in Your Infrastructure Project @ Reed's Crossing
Oct 11 @ 1:00 pm – 5:00 pm

Click here for more information on the event.

Event Registration: or call 503.643.8710

OMSI Science Pub Lecture
Nov 1 @ 7:00 pm – 9:00 pm
OMSI Science Pub Lecture
Back to the Night: Why Bringing Back the Stars is Not Just for the Birds 
Most of us live in cities that are ablaze—from billboards to parking lots to streetlights—even while we sleep. Today, 80% of North Americans live in places from which they cannot see our own home galaxy because of the fog of light pollution. The overabundance of light at night has dire ecological consequences for plants, birds, fish and other wildlife, as well as for human health and culture. In this talk, biologist Mary Coolidge will explore the night’s wondrous mysteries and ask the question: Can we restore dark skies while simultaneously crafting vibrant, beautiful, and safe nighttime cityscapes?  
McMenamins Mission Theater

1624 NW Glisan, Portland

RSVP now for tickets: 
Send an email to
This event is open to all ASLA members. Tickets are free to the first 15 people to RSVP.
Other details:
Join us at 6pm to enjoy refreshments and trivia. Seating is first-come, first-serve.
More info from OMSI here.
LARE Prep Sessions, presented by WASLA
Nov 2 – Nov 3 all-day

The Washington State Chapter of the ASLA Student and Emerging Professionals Committee presents LARE Prep Sessions with Corson Learning

The WASLA Student + Emerging Professionals Committee will be hosting LARE Preparatory Sessions in Seattle, WA for Section 1: Project and Construction Management and Section 4: Grading, Drainage and Construction Documents. Cheryl Corson of Corson Learning ( will be leading the prep sessions. Breakfast and lunch will be provided each day for the participants.

Save the Dates!

Section 1 – Friday, November 2nd

Section 4 – Saturday, November 3rd

Location – Seattle, WA

Registration page:

Registration is open to all regardless of WASLA membership or location. Space is limited space so don’t delay registering. Early bird pricing ends September 10th. Registration ends on October 26th. Upon registering, the S+EP will send specific locations and daily schedules.

For more information, contact Michelle Richmond at WASLA.

ASLA December Happy Hour
Dec 13 @ 5:30 pm – 8:00 pm
ASLA December Happy Hour

ASLA December Happy Hour
Thursday December 13th 5:30-8:00
Teote House Cafe
1615 SE 12th Avenue
Portland, OR

Sponsored by Victor Stanley.
Email to RSVP.

ASLA Oregon sketchPDX Holiday Event!
Dec 19 @ 6:00 pm – 7:30 pm
ASLA Oregon sketchPDX Holiday Event!

Join us for the final sketchPDX event of the year. Drinks and food will be covered, just bring a sketchbook and your favorite drawing tools. Emerging professionals, students, and all ASLA members are welcome to attend.

Where: Shift Drinks, 1200 SW Morrison St, Portland OR
When: Wednesday, December 19th

Let us know if you can make it, we’ll save you a seat! RSVP to

Willamette Valley Event: The Ancient Problem of Horsetail
Jan 17 @ 12:00 pm – 1:30 pm

The Ancient Problem of Horsetail – Can We Design Around It

This lecture has been approved by the Oregon Chapter of ASLA for 1.0 Health, Safety and Welfare PDH for Oregon Registered Landscape Architects.

Dan Sutton, Senior Vice President, Rexius Forest By-Products Inc.
Marina Wrensch, RLA, ASLA, LEED AP BD+C, CSI
Mark Spies, Landscape Construction Manager, Rexius Forest By-Products Inc.

Event Location/Time:
Oregon Electric Station
27 East 5th Avenue, Eugene 97401


Horsetail is prevalent in the Willamette Valley and is one of the few unwelcome surprises that can quickly turn a carefully crafted masterpiece into a public eyesore.  This presentation will focus on learning more about how horsetail arrives to the project site, what the designer can do to help minimize its existence, and what can be done to eradicate or control it once it appears.  The discussion will be in a panel format including speakers with experience and/or expertise in each of the above areas.

Learning Objectives:
1) Understand how soils are created and how horsetail gets introduced into soil mixes.
2) Understand what options are available to designers to minimize the occurrence of horsetail on a project.
3) Understand the most successful options to control and/or remove horsetail from a project site once it appears.

About the Speakers:
Dan Sutton: Senior Vice President, has been with the company since 1978.  He is responsible for overseeing the marketing and sales for Rexius, including product and service development. He is specifically responsible for the formulation of all the company’s soil blends for commercial growers, and landscape soils for both commercial and residential applications.  His 40 years of experience with Rexius gives him a great deal of practical insight into the various concerns with quality and performance of soils for their intended use.

Marina Wrensch was born and raised in Germany, where she graduated from university in 2001 as Graduate Engineer in Landscape Design. Marina received a Fulbright Scholarship to study at the University of Oregon where she graduated in 2005 with a bachelor and master’s degree in landscape architecture. She worked in landscape architecture for several years in Germany and since 2007 here in Eugene, both with Satre Associates and since early 2010 at Cameron McCarthy; she became licensed in 2011. Ever since graduating high school Marina has been exposed to horsetail in landscapes, both on the maintenance side in Germany and during her years as a landscape architect here in Oregon.

Mark Spies manages the Landscape Construction Department at Rexius which utilizes 45 employees to install residential and commercial landscape projects in the Eugene and Springfield area.  He is a licensed Landscape Professional, all phases, with the Oregon Landscape Contractors Board; a licensed contractor with the Oregon Construction Contractors Board; and a licensed commercial herbicide applicator. He graduated in 1984 from OSU with a bachelors in business and a horticulture minor and now has over 34 years of experience as a landscape professional. Through his years of experience, the avoidance and control of horsetail has been an ongoing challenge.

Portland Winter Lights Festival Walking Tour
Feb 7 @ 5:30 pm – 7:00 pm
Portland Winter Lights Festival Walking Tour

Join us for a casual walking tour to explore the upcoming Portland Winter Lights Festival. We’ll be meeting first at the Portland Food Hall for refreshments before venturing out to see the exhibits in the West Waterfront Zone, and if we’re feeling warm and brave, continuing on to the Eastside Zone near OMSI.

Location: Portland Food Hall, 827 SW 2nd Ave
Time: Meet up at 5:30 for drinks and snacks, we’ll begin the tour around 6:15
RSVP: Let us know if you can make it! Email:

More info about the festival here:

ASLA OR Winter Happy Hour
Feb 28 @ 5:30 pm – 8:00 pm