Wednesday - May 26, 2010

Wetland Identification Friday May 28

Wetland Identification Friday May 28

Starting today crews are idenitfying wetlands along the existing water pipeline in West Linn and Lake Oswego.  The work will start this Friday along Highway 43 from Cedaroak Dr. to the end of the pavement of Highway 43 and on Iron Mountain from Mulligan Lane to Upper Drive.  Flags will be placed in these areas to mark certain features, and they will be removed later.

To view a large map showing the existing pipeline alignment please click here.

Starting today crews will be idenitfying wetlands along the existing water pipeline in West Linn and Lake Oswego.  The work will start this Friday along Highway 43 from Cedaroak Dr. to the end of the pavement of Highway 43 and on Iron Mountain from Mulligan Lane to Upper Drive.  Flags will be placed in these areas to mark certain features, and they will be removed later.

To view a large map showing the existing pipeline alignment please click here.

Wetland Delineation typically entails collecting data on plant species, signs of wetland hydrology, and data on a shallow soil profile. Data collection is mostly non-invasive, with the exception of hand digging a few shallow soil pits (no more than 10 inches wide and 20 inches deep). The soil is reviewed on-site for color and texture and then returned to the pit with the original vegetation/ground cover placed back on top. They will do their best to leave as little trace as possible. The location of soil pits, wetland boundaries, and waterway boundaries will be marked with typical survey flagging (i.e. yellow, orange, and/or pink) that will either entail a small pin flag stuck in the ground or survey tape tied to vegetation or other stable features. No spray paint will be used. We use the minimal amount of flagging needed to adequately map the various features.

A second single day of Wetland Delineation will be performed in mid to late June on Hunt Club to Waluga (via Lake Grove), in Waluga Park and along Carman Dr. to Bonita Road.

Questions or Concerns about the Wetland Delineation can be directed to:

Terry Buchholz, (503) 469-0812, or send email.