Engineering Inc. - May/June 2006 - 31

honor awards New Columbia, Portland, Ore. I-405 Bellevue Direct Access,
Bellevue, Wash. KPFF Consulting Engineers Portland, Ore. HDR, Inc.
Bellevue, Wash. s s As Oregon's largest public housing complex, residents
of Colum- One of Washington State's most heavily traveled corridors, I-405
bia Villa were isolated from adjacent neighborhoods, and endured and
Downtown Bellevue, was in critical need of improvement. a crumbling
infrastructure resulting in numerous catastrophic The project team avoided
a potential one-year road closure by floods. The project team transformed
Columbia Villa into New building half of a new Northeast 8th Street Bridge
on temporary Columbia, Portland's largest green street neighborhood. New
piers. Once completed, the new two-span, 1,800-ton superstruc- Columbia's
redesigned streets feature the project team's pioneered ture was raised
off its temporary piers using hydraulic jacks and storm water management
system to eliminate flooding. Streets rolled 64 feet to its permanent
position all in just 10 hours. are now threads that weave the community
back into the larger The project included the relocation of
collector/distributor lanes urban fabric. Other landscaping enhancements
include the rede- and improvements to interchanges and bridges at
Northeast 4th sign of utilities, housing and sidewalks. and Northeast 6th
streets. Lake Bard Hypolimion Oxygenation, Wetlands-Based Indirect Potable
Reuse, Thousand Oaks, Calif. West Palm Beach, Fla. Kennedy/Jenks
Consultants San Francisco CDM West Palm Beach, Fla. s s The Calleguas
Municipal Water District purchases and stores For decades, West Palm Beach
relied solely on Lake treated water in Lake Bard, an open reservoir, before
re-filtering Okeechobee for its drinking water. But steadily increasing
con- and distribution to Ventura County municipalities. Each spring, sumer
demand including a portion of the lake's supply being the reservoir
stratifies, separating into warm and cold layers and used in the
Everglades Restoration Program made finding an using up all available
dissolved oxygen. The result is a layer of additional water resource
critical. The project team designed an degraded water, which is more
difficult and expensive to treat innovative, wetlands-based, indirect
potable reuse system fea- before distribution. The project team drew on
research in lake turing a state-of-the-art advanced wastewater treatment
facility. limnology to design a system that captures oxygen-rich gas from
a The system discharges treated water to a specially designed wet- nearby
treatment plant's ozone system once considered a waste lands reuse site
for further enhancement and aquifer recharge. product and uses it to
oxygenate the bottom layer of the lake The water is then transferred to a
well-field to augment the with a stainless steel pipeline. The solution
has cut the plant's city's water source. The first-of-its-kind sustainable
system has operating and maintenance costs, increased treatment capacity
provided a much-needed water supply solution while protecting and resulted
in higher quality, better-tasting water, in addition to the health of the
public and the Everglades ecosystem. advancing the science of water
treatment engineering. 31 MaY / JUNE 2006 ENGINEERING INC.
Engineering Inc. - May/June 2006

Table of Contents for the Digital Edition of Engineering Inc. - May/June 2006
