Underground Construction - November 2018 - 15

Work for Housing Development
the few
female-owned construction
firms in the Pacific Northwest -
to perform the demolition.
Lauzon Contracting has been
working with representatives
from Walsh Construction at the
job site for more than two years.
Demolition included removal of
existing underground utilities,
to the street. In addition, Lauzon
was responsible for excavating
10,000 cubic yards of dirt and
preparing the site for the next
stages of development.

Underground work
After demolition, Lauzon Contracting used its Doosan crawler
excavators to perform a series of
complex utility installations. Led

by Construction Manager Joe
Gadotti, employees installed new
sewer lines, domestic and fire
lines, and the structures for fire
and water. Tia Olsen, controller
at Lauzon Contracting, said the
team used multiple crawler excavators to dig as deep as 15 feet to
install the new sewer lines on the
property. Altogether, the company installed approximately 4,000
linear feet of sewer, storm and
water utilities, connecting the
new lines to nearby city of Milwaukie public works services.
Also installed at the site was a
water detention system to collect
and manage excess stormwater
runoff in the urban setting. The
water will be temporarily stored
there, underneath the new devel-

opment, until it is released to a
nearby drain where it enters the
Milwaukie stormwater system.
Olsen said it was one of the most
difficult parts of the underground
work that spanned approximately four months. After that,
Lauzon Contracting proceeded
with structural excavation for below-grade parking garages.
The new NHA campus is
scheduled to be completed in December 2018.

Excavating workload
To handle underground excavation tasks, Lauzon Contracting
relies on its crawler excavators.
The company currently owns
seven models (all Doosan) -
ranging from a 14-metric-ton

DX140LC-3, to a 35-metric-ton
DX350LC-5 model - to accomplish its trenching needs.
Equipment versatility is critical to the success of Lauzon Contracting and its owners: David
and Nancy Lauzon. Excavators
are used throughout the company's work as a site preparation
contractor, including demolition,
clearing, structural excavation
for the buildings and installation
of utilities. And they're equipped
with buckets and hydraulic
clamps to assist with all stages of
the construction.
For example, operators reverse
their buckets on the excavators to
meter dirt or rock when they are
digging a plumbing trench, especially if it's an area where footings

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Underground Construction - November 2018

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