Clark Douglas, Bellevue Public concerns over the construction of Lakemont Boulevard in the sensitive Lewis Creek corridor led to major environmental controls that are working well. Phosphorus occurs naturally in soil and large construction sites are vulnerable to sediment and chemical laden runoff.
Erosion controls minimize the release caused by rainfall on the disturbed soils.
The first three months have shown a 96.7 percent effectiveness in phosphorus capture, above the 75 percent minimum project standard and the 90 percent project goal. During this time the rainfall was 188 percent of normal and the contractor could not work twenty percent of the time. There are also restrictions on when erosion inducing earthwork can be done. Excavation, embankment, and grading are allowed only in the driest months from May to September with site stabilization and shutdown in October. During the cold, wet months the contractor will be forming and pouring the superstructure.