HomeMy WebLinkAboutEx18_Wetland and Stream Reconnaissance Report_cover page January 18, 2017
AOA-5346
John Graves
johng.bluefern@gmail.com
SUBJECT: Wetland and Stream Reconnaissance for:
Minter PUD Townhouses Renton, WA (PRE16-000824)
Parcels 214480-0295, -0285, -0500, -0488, and -0487
Dear John:
On December 12, 2016 I conducted a wetland and stream reconnaissance on the
subject property utilizing the methodology outlined in the May 2010 Regional
Supplement to the Corps of Engineers Wetland Delineation Manual: Western
Mountains, Valleys, and Coast Region (Version 2.0). No wetlands or streams were
identified on or adjacent to the property during the field investigation.
The site is currently developed with the old Minter plant nursery and greenhouse
facility. The property slopes down from north to south and nearly the entire property
appears to have been historically graded. Vegetation on the site consists primarily
of scattered tree clumps with dense patches of Himalayan blackberry (Rubus
armeniacus).
During the reconnaissance, a small remnant swale in the southeast corner of the
property was reviewed. Vegetation within the vicinity of the swale included black
cottonwood (Populus trichocarpa), big-leaf maple (Acer macrophyllum), Himalayan
blackberry, and snowberry (Symphoricarpos albus). No hydrophytic plant
communities were observed.
Borings taken throughout the swale revealed highly disturbed profiles indicating
historic grading. The soils were dry at the time of a “wet season” review and there
was no evidence of ponding or prolonged soil saturation anywhere within the swale
during the field investigation.