February Meeting Announcement

DATE:    Wednesday, February 22nd 2017
PLACE:  Hawthorne Lucky Lab Brew Pub, 915 SE Hawthorne Blvd
TIME:     11:30 a.m. Networking, 12:00 – 1:00 p.m. Presentation
TOPIC: Surface Water Diversions and Fish Protection
SPEAKER: Shane Sheldon, Viento Engineering


Farmers, ranchers, hydropower producers, municipalities, fish hatcheries all commonly use surface water for their core operation. To get this water, users must build and maintain an intake and water delivery system that can transport water from a river or lake. Since these intake and conveyance systems can be located in difficult to reach or flood prone terrain miles from the point of use, operators and agencies have spent decades trying out different technologies that keeps fish, sticks, leaves, and other debris from entering the canals, clogging the system, and preventing the flow of water. While maintaining these systems is costly for water users, it has proven to be an equally large problem for fish.

Fish screens are devices placed at points of diversions to prevent the fish, organic debris, and sediment that are naturally carried along in a river system from entering the diversion. State and federal law now require fish protection screens at most diversions however Oregon, Washington, Idaho, Montana, and California each have tens of thousands of unscreened or noncompliant diversions.

The presentation will cover:

  • – A brief background on fish screening in the West
  • – When and why do we need fish screens?
  • – Overview of the rules and regulations for fish screens
  • – The basic types of fish screens and examples where they may be appropriate
  • – Some general design considerations for a successful intake and screening project

Shane Sheldon is a water resource engineer and founder of Viento Engineering in Hood River, Oregon. He has been a part of several screening design projects across the Western United States as well as working with operators on the long term maintenance and upkeep of intake and screening systems.

November Meeting Announcement

DATE:    Wednesday, November 30th
PLACE:  Hawthorne Lucky Lab Brew Pub, 915 SE Hawthorne Blvd
TIME:     11:30 a.m: Networking, 12:00 – 1:00 p.m: Presentation
SPEAKER:  Ken Vigil, Mauria Pappagallo and Nate Robinson, ESA
TOPIC: Water Resources Engineering for Portland’s Tilikum Crossing


Tilikum Crossing, Portland’s first new bridge over the Willamette River since 1973, is part of TriMet’s 7.3-mile Portland-Milwaukie Lightrail transit project that connects downtown Portland with the City of Milwaukie.  This 1,720-foot long cable-stayed transit bridgetilikum includes two pylon-supported pier towers within the active channel of the Willamette River.

This presentation will focus on the unique water resources engineering aspects of this large transit bridge project.  Design challenges included providing fish passage around bridge piers for endangered salmonids, understanding and managing hydraulic scour and channel bed erosion, and providing stormwater management for runoff from the bridge deck.

Tilikum Crossing (Bridge of the People) is the largest car-free bridge in the United States. As the latest addition to Portland’s bridge-scape, Tilikum Crossing carries the Portland Streetcar, the MAX Orange Line, TriMet buses, and cyclists and pedestrians over the Willamette River.


Ken Vigil, PE, is a senior civil and environmental engineer and one of the founders of Vigil-Agrimis.  He has worked on water resources projects in the Pacific Northwest and the Great Lakes region for almost 35 years, including projects for fish passage, bridge hydraulics, stream restoration, water quality, and stormwater management.
Mauria Pappagallo, PE, is a water resources engineer with over a decade of professional experience in fluvial geomorphology, bridge hydraulics, hydraulic modeling, scour countermeasure design, and riparian and floodplain restoration design.   She has reviewed scour issues and designed scour countermeasures at bridge and culvert sites throughout Oregon and Washington.

Nate Robinson, PE, is a Civil and Water Resources Engineer with 7 years of experience in stormwater design, hydraulic and hydrologic analysis, utility design, and site design. He has worked extensively on innovative stormwater projects within the City of Portland and throughout Oregon.

October Meeting Annoucement

DATE:    Wednesday, October 26th
PLACE:  Hawthorne Lucky Lab Brew Pub, 915 SE Hawthorne Blvd
TIME:     11:30 a.m: Networking, 12:00 – 1:00 p.m: Presentation
SPEAKER:  Marlys Mock and Todd Perimon, TVWD
TOPIC: Regional Willamette Water Supply Program

tvwdThe regional Willamette Water Supply System (WWSS) will provide additional resiliency and redundancy to the water supplies of the City of Hillsboro and the Tualatin Valley Water District in Washington County and other potential project partners. The WWSS will include a 60 MGD water treatment plant, 30 million gallons of terminal reservoir storage, and more than 30 miles of 66-in to 48-in diameter pipeline. This presentation will provide an overview of the WWSS, detail the efforts of the Program Team and agency partners to identify and gain endorsement of an approved pipeline route, and discuss how the team coordinates with the numerous stakeholders on this $1.2 billion regional water supply program.


Marlys Mock has worked in public involvement and communications in the Pacific Northwest since 1998 as both a consultant and public official.  Prior to joining the Willamette Water Supply Program (WWSP) Marlys was the facilities liaison for Portland Public Schools. In her current role as the Communication and Outreach Coordinator for the WWSP, Marlys oversees the communication and outreach efforts to 8 cities, two counties and the numerous stakeholder groups in the region.

Todd Perimon is a registered Civil Engineer with over 25 years of experience in planning, design and construction of large water infrastructure projects.  He has been involved in numerous seismic resiliency projects including serving on the Water and Wastewater Committee that developed the Oregon Resilience Plan.  Todd currently serves as the Program Delivery and Real Estate manager for the WWSP.