Stormwater Wall Presentation

Metro Expo Center

STORMWATER WALL

Mike FahaShawn Kummer April 9, 2015

Why a stormwater wall?

Parking Lots

Green Roofs

Green Streets

Why a stormwater wall?• Green infrastructure solution for buildings that cannot hold an ecoroof

• May provide additional stormwater management in dense urban areas

• Provide opportunity to increase plant material in our urban spaces

Why the Expo Center?

PROJECT SITE

EXPO CENTER• 650 Events Annually• 700,000 Visitors

How do you design it?

Design Considerations

• Manages stormwater• Stand alone structure• Modular• Scale‐able• Monitoring

• Easily constructed• Low maintenance• Overflow safeguards• Beautiful• Low water use

Idea Generation

• Combined parallel and series provides the best of both systems

• Splitting water volume among multiple systems

• Each system has multiple facilities in series for redundancy

Construction

Some Specifics• 9,390 square feet of roof• 280 square feet of facility surface area (2.8% sizing)• 240 linear feet of channel• $150,000 total construction cost• 12 week construction period

City of Portland BESMetro

GreenWorksCascade Design ProfessionalsColton Construction

Questions?April 9, 2015