20130331 Project Narrative 08212013 PROJECT NARRATIVE
WEBER PROPERTY GRADING AND FILL PROPOSAL
Prepared by
Barghausen Consulting Engineers, Inc.
August 12, 2013
Our Job No. 12433
PROJECT SUMMARY
The applicant proposes to grade most of the site to accommodate future development of the property
after a grading permit is issued and a FEMA Letter of Map Revision is approved. Grading will include
moving soil around on the site (approximately 3,650 cubic yards each cut and fill for flood plain fill and
compensatory storage volumes) as well as importing additional material to stage the east portion of the
site for future development. A total of approximately 10,000 cubic yards (6,500 cubic yards of import) is
proposed with the subject permit application.
After the grading efforts have been completed, the applicant is also proposing to restore the temporarily
impacted Yelm Creek Riparian Habitat Area by planting native trees and shrubs as described in the
Mitigation Plan.
FLOOD PLAIN &YELM CREEK HABITAT MITIGATION�
To ensure that no loss of functions and values occurs to the flood hazard areas or on-site critical areas,
the applicant is proposing to restore the entire 83,350 square#eet (1.91 acres) of cut with native trees and
shrubs. During grading, topsoil in the proposed cut area should be reserved and stockpiled on-site.
Please see Map Sheet CA1.00 for a depiction of the proposed restoration area on the subject site.
Per industry standards and guidelines, this mitigation proposal includes calculating required plant
quantities by planting 60% of the mitigation area with native trees and planting 40% of the mitigation area
with native shrubs. The native trees are proposed to be planted on 12-foot centers (spaced a minimum of
12 feet apart), while the native shrubs are proposed to be planted on 6-foot centers (spaced a minimum
of 6 feet apart) among the mitigation areas. Using this approach, the applicant is proposing to plant
approximately 348 trees and 924 shrubs among the buffer restoration area.
STORMWATER MANAGEMENT
The project site is currently undeveloped and vacant. There are compacted gravel areas and also areas
with non-native plant species as well as native plant species, After #he project is completed, the entire
site will be pervious—during the construction activities, the compacted gravel areas will be removed and
replaced with free draining fill material such as sand/pit run mix. No stormwater controls are necessary
as the post-project site will infiltrate all precipitation and no new stormwater will be generated.
' Excerpts taken from Critical Areas Report& Proposed Mitigation Plan prepared by Wetlands and
Wildlife, Inc., dated June 10, 2013