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Wetland Resources, Inc. iCap Senza
April 7, 2016 WRI #16072 1
April 5, 2016
iCap Equity, LLC
Attn: Barbara Rodgers
10900 NE 8th St, # 1000
Bellevue, WA 98004
RE: Critical Areas Determination Report for King County parcels 3342700415,
420, 425, 427
INTRODUCTION
iCap Equity, LLC contracted Wetland Resources, Inc. (WRI) to perform a wetland
determination within and surrounding the aforementioned 3.83-acre parcels, located in the City
of Renton, WA. The purpose of the visit was to evaluate and locate jurisdictional wetlands and
streams on and in the vicinity of the property, to document the findings in a brief letter, and to
address off-site wetland concerns brought up during the SEPA Environmental Review public
comment period. The site visit occurred on April, 1 2016. Access is from an existing driveway
extending south from N 40th St. The Public Land Survey System (PLSS) locator for the subject
property is Section 32, Township 24N, Range 05E, W.M.
Figure 1: Aerial Overview of the Subject Property
Wetland Resources, Inc. iCap Senza
April 7, 2016 WRI #16072 2
METHODOLOGY
Prior to conducting the site reconnaissance, public resource information was reviewed to gather
background information on the subject property and the surrounding area in regards to
wetlands, streams, and other critical areas. These sources include the USFWS National
Wetlands Inventory (NWI), USDA/NRCS Web Soil Survey, WDFW SalmonScape Map,
WDFW Priority Habitat and Species (PHS) Interactive Map, and King County iMap.
• USFWS NWI Map: The NWI map does not illustrate any wetlands on the subject
property.
• USDA/NRCS Web Soil Survey: The Web Soil Survey indicates that the subject property
is underlain by Alderwood gravelly sandy loam 8 to 15 percent slopes and Indianola
loamy sand, 5 to 15 percent slopes. Neither of these soils are listed as hydric.
• WDFW SalmonScape Map: The SalmonScape Map does not show any streams on the
subject property. May Creek is shown approximately 750 feet north of the subject
property
• WDFW Priority Habitats and Species (PHS) Map: The PHS map does not illustrate any
PHS species or areas on the subject property. Both Lake Washington and May Creek are
identified as Priority Habitats, but are well off-site.
• King Count iMap: iMap does not show any critical areas on the subject property within
200 feet.
Wetland areas were determined using the routine determination approach described in the
Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987) and the
Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western
Mountians, Valleys, and Coast Region (Version 2.0) (U.S. Army Corps of Engineers 2010).
Under the routine methodology, the process for making a wetland determination is based on
three steps:
1) Examination of the site for hydrophytic vegetation (species present and percent cover);
2) Examination of the site for hydric soils;
3) Determining the presence of wetland hydrology
SITE DESCRIPTION
The subject property is located between Interstate 405 and Lake Washington in the City of
Renton, WA. Three existing single-family homes were recently present within the boundary of
the site, but were in various stages of demolition at the time of the site visit. The property has a
moderate west aspect from Park Avenue North along the eastern property boundary to Lake
Washington Boulevard along the western property boundary. On-site vegetation is a mix of
domestic landscaping and ornamental landscaping surrounding the old home sites and
abandoned pasture/lawn areas consisting of reed canarygrass and Himalayan blackberry.
Sporadic patches of native vegetation including western red cedar and willows are also present
on-site.
Wetland Resources, Inc. iCap Senza
April 7, 2016 WRI #16072 3
RESULTS
Based on the field investigation and existing available on-line resources, no wetlands or streams
are located within the boundary of the investigation area or within the surrounding 200 feet,
including the potential off-site area identified by the neighbor. One area of concern was observed
during the site investigation. This area is dominated by a combination of reed canarygrass and
Himalayan blackberry with sporadic Scouler’s willow. Soils within this area are generally very
dark brown (10YR 2/2) to brown (10YY 3/3) and were moist to dry at the time of investigation
(see data attached data sites). The overall lack of wetland hydrology is particularly telling given
the high levels of recorded precipitation during the 2015/2016 water year. The area identified
by the neighbor as a potential off-site wetland was evaluated by visual inspection from the subject
property. This area is upslope of the area of concern, dominated by mowed lawn with common
dandelion throughout. Immediately downslope of this area (on-site) is dominated by Himalayan
blackberry (see figures 1 and 2). Based on visual observations, this off-site area does not meet the
criteria for hydrophytic vegetation and therefore does not meet the definition of wetland.
Figure 2: Looking off-site to the southeast.
Figure 3: Looking west, stake denotes
approximate property boundary.
USE OF THIS REPORT
This Determination Report is supplied to iCap Equity as a means of determining the presence of
on-site and adjacent critical areas as required by the City of Renton. This report is based largely
on readily observable conditions and, to a lesser extent, on readily ascertainable conditions. No
attempt has been made to determine hidden or concealed conditions.
The laws applicable to critical areas are subject to varying interpretations and may be changed at
any time by the courts or legislative bodies. This report is intended to provide information
deemed relevant in the applicant's attempt to comply with the laws now in effect.
Wetland Resources, Inc. iCap Senza
April 7, 2016 WRI #16072 4
This report conforms to the standard of care employed by wetland ecologists. No other
representation or warranty is made concerning the work or this report and any implied
representation or warranty is disclaimed.
Wetland Resources, Inc.
Scott Brainard, PWS
Principal Ecologist
Enclosures:
Army Corps Wetland Determination Data Forms (S1 and S2)
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
WETLAND DETERMINATION DATA FORM – Western Mountains, Valleys, and Coast Region
Project/Site:
City/County:
Sampling Date:
Applicant/Owner:
State:
Sampling Point:
Investigator(s):
Section, Township, Range:
Landform (hillslope, terrace, etc.):
Local relief (concave, convex, none):
Slope (%):
Subregion (LRR):
Lat:
Long:
Datum:
Soil Map Unit Name:
NWI classification:
Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.)
Are Vegetation
, Soil
, or Hydrology
significantly disturbed? Are “Normal Circumstances” present? Yes No
Are Vegetation
, Soil
, or Hydrology
naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes No
Hydric Soil Present? Yes No
Wetland Hydrology Present? Yes No
Is the Sampled Area
within a Wetland? Yes No
Remarks:
VEGETATION – Use scientific names of plants.
Absolute Dominant Indicator
Tree Stratum (Plot size:
) % Cover Species? Status
1.
2.
3.
4.
= Total Cover Sapling/Shrub Stratum (Plot size:
)
1.
2.
3.
4.
5.
= Total Cover
Herb Stratum (Plot size:
)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
= Total Cover
Woody Vine Stratum (Plot size:
)
1.
2.
= Total Cover
% Bare Ground in Herb Stratum
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW, or FAC:
(A)
Total Number of Dominant
Species Across All Strata:
(B)
Percent of Dominant Species
That Are OBL, FACW, or FAC:
(A/B)
Prevalence Index worksheet:
Total % Cover of: Multiply by:
OBL species
x 1 =
FACW species
x 2 =
FAC species
x 3 =
FACU species
x 4 =
UPL species
x 5 =
Column Totals:
(A)
(B)
Prevalence Index = B/A =
Hydrophytic Vegetation Indicators:
Rapid Test for Hydrophytic Vegetation
Dominance Test is >50%
Prevalence Index is ≤3.01
Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet)
Wetland Non-Vascular Plants1
Problematic Hydrophytic Vegetation1 (Explain)
1Indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Hydrophytic
Vegetation
Present? Yes No
Remarks:
Senza Lakeview Renton/King 4/1
iCap Equity, LLC WA S1
SB. JL 32, 24, 5
hillslope concaver <5
LRR A 47.527110 -122.202964
Alderwood gravelly sandy loam 8 to 15 % and Indianola loamy sand 5 to 15% slopes None
4
4
4
4
4 4
Precipitation levels are at 150% of normal for the water year.
Alnus rubra 20 Y Fac
20
Rubus armeniacus 40 Y FacU
Acer circinatum 20 Y Fac
Salix scouleriana 20 Y Fac
80
Phalaris arundinacea 60 Y FacW
60
4
5
80
0
0
0
0
0
0 0
4
4
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
SOIL Sampling Point:
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
Histosol (A1) Sandy Redox (S5) 2 cm Muck (A10)
Histic Epipedon (A2) Stripped Matrix (S6) Red Parent Material (TF2)
Black Histic (A3) Loamy Mucky Mineral (F1) (except MLRA 1) Very Shallow Dark Surface (TF12)
Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Other (Explain in Remarks)
Depleted Below Dark Surface (A11) Depleted Matrix (F3)
Thick Dark Surface (A12) Redox Dark Surface (F6) 3Indicators of hydrophytic vegetation and
Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) wetland hydrology must be present,
Sandy Gleyed Matrix (S4) Redox Depressions (F8) unless disturbed or problematic.
Restrictive Layer (if present):
Type:________________________________
Depth (inches):________________________
Hydric Soil Present? Yes No
Remarks:
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (2 or more required)
Surface Water (A1) Water-Stained Leaves (B9) (except MLRA Water-Stained Leaves (B9) (MLRA 1, 2,
High Water Table (A2) 1, 2, 4A, and 4B) 4A, and 4B)
Saturation (A3) Salt Crust (B11) Drainage Patterns (B10)
Water Marks (B1) Aquatic Invertebrates (B13) Dry-Season Water Table (C2)
Sediment Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation Visible on Aerial Imagery (C9)
Drift Deposits (B3) Oxidized Rhizospheres along Living Roots (C3) Geomorphic Position (D2)
Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Shallow Aquitard (D3)
Iron Deposits (B5) Recent Iron Reduction in Tilled Soils (C6) FAC-Neutral Test (D5)
Surface Soil Cracks (B6) Stunted or Stressed Plants (D1) (LRR A) Raised Ant Mounds (D6) (LRR A)
Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) Frost-Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (B8)
Field Observations:
Surface Water Present? Yes No Depth (inches):
Water Table Present? Yes No Depth (inches):
Saturation Present? Yes No Depth (inches):
(includes capillary fringe)
Wetland Hydrology Present? Yes No
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks:
S1
0-14"10YR 2/2 90 sil
14-18+"10YR 4/2 80 10YR 4/6 20 C M fsl
4
Diagnostic layer is to deep to meet the criteria for either A11 or F6
4
4
4 4
Soils were moist at the time of investigation even with higher than normal precipitation for the water year.
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
WETLAND DETERMINATION DATA FORM – Western Mountains, Valleys, and Coast Region
Project/Site:
City/County:
Sampling Date:
Applicant/Owner:
State:
Sampling Point:
Investigator(s):
Section, Township, Range:
Landform (hillslope, terrace, etc.):
Local relief (concave, convex, none):
Slope (%):
Subregion (LRR):
Lat:
Long:
Datum:
Soil Map Unit Name:
NWI classification:
Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.)
Are Vegetation
, Soil
, or Hydrology
significantly disturbed? Are “Normal Circumstances” present? Yes No
Are Vegetation
, Soil
, or Hydrology
naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes No
Hydric Soil Present? Yes No
Wetland Hydrology Present? Yes No
Is the Sampled Area
within a Wetland? Yes No
Remarks:
VEGETATION – Use scientific names of plants.
Absolute Dominant Indicator
Tree Stratum (Plot size:
) % Cover Species? Status
1.
2.
3.
4.
= Total Cover Sapling/Shrub Stratum (Plot size:
)
1.
2.
3.
4.
5.
= Total Cover
Herb Stratum (Plot size:
)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
= Total Cover
Woody Vine Stratum (Plot size:
)
1.
2.
= Total Cover
% Bare Ground in Herb Stratum
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW, or FAC:
(A)
Total Number of Dominant
Species Across All Strata:
(B)
Percent of Dominant Species
That Are OBL, FACW, or FAC:
(A/B)
Prevalence Index worksheet:
Total % Cover of: Multiply by:
OBL species
x 1 =
FACW species
x 2 =
FAC species
x 3 =
FACU species
x 4 =
UPL species
x 5 =
Column Totals:
(A)
(B)
Prevalence Index = B/A =
Hydrophytic Vegetation Indicators:
Rapid Test for Hydrophytic Vegetation
Dominance Test is >50%
Prevalence Index is ≤3.01
Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet)
Wetland Non-Vascular Plants1
Problematic Hydrophytic Vegetation1 (Explain)
1Indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Hydrophytic
Vegetation
Present? Yes No
Remarks:
Senza Lakeview Renton/King 4/1
iCap Equity, LLC WA S2
SB. JL 32, 24, 5
hillslope concaver <5
LRR A 47.527110 -122.202964
Alderwood gravelly sandy loam 8 to 15 % and Indianola loamy sand 5 to 15% slopes None
4
4
4
4 4
Precipitation levels are at 150% of normal for the water year.
Thuja plicata 30 Y Fac
Alnus rubra 20 Y Fac
50
Rubus armeniacus 80 Y FacU
Salix scouleriana 20 Y Fac
100
3
4
75
0
0
0
0
0
0 0
4
4
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
SOIL Sampling Point:
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
Histosol (A1) Sandy Redox (S5) 2 cm Muck (A10)
Histic Epipedon (A2) Stripped Matrix (S6) Red Parent Material (TF2)
Black Histic (A3) Loamy Mucky Mineral (F1) (except MLRA 1) Very Shallow Dark Surface (TF12)
Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Other (Explain in Remarks)
Depleted Below Dark Surface (A11) Depleted Matrix (F3)
Thick Dark Surface (A12) Redox Dark Surface (F6) 3Indicators of hydrophytic vegetation and
Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) wetland hydrology must be present,
Sandy Gleyed Matrix (S4) Redox Depressions (F8) unless disturbed or problematic.
Restrictive Layer (if present):
Type:________________________________
Depth (inches):________________________
Hydric Soil Present? Yes No
Remarks:
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (2 or more required)
Surface Water (A1) Water-Stained Leaves (B9) (except MLRA Water-Stained Leaves (B9) (MLRA 1, 2,
High Water Table (A2) 1, 2, 4A, and 4B) 4A, and 4B)
Saturation (A3) Salt Crust (B11) Drainage Patterns (B10)
Water Marks (B1) Aquatic Invertebrates (B13) Dry-Season Water Table (C2)
Sediment Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation Visible on Aerial Imagery (C9)
Drift Deposits (B3) Oxidized Rhizospheres along Living Roots (C3) Geomorphic Position (D2)
Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Shallow Aquitard (D3)
Iron Deposits (B5) Recent Iron Reduction in Tilled Soils (C6) FAC-Neutral Test (D5)
Surface Soil Cracks (B6) Stunted or Stressed Plants (D1) (LRR A) Raised Ant Mounds (D6) (LRR A)
Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) Frost-Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (B8)
Field Observations:
Surface Water Present? Yes No Depth (inches):
Water Table Present? Yes No Depth (inches):
Saturation Present? Yes No Depth (inches):
(includes capillary fringe)
Wetland Hydrology Present? Yes No
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks:
S2
0-12"10YR 2/2 90 sil
12-18+"110YR 4/3 90 10YR 4/6 5 C M sl
4
4
4
4 4
Soils were moist at the time of investigation even with higher than normal precipitation for the water year.