HomeMy WebLinkAboutRS_Critical_Area_Report_251209_v1September 11, 2024
Zach Schneider
Schneider Homes, Inc.
6510 Southcenter Boulevard
Tukwila, Washington 98188
RE: Critical Area Report – Parcel #3123059119
City of Renton, Washington
SWC Job #23-126
Dear Zach,
This report describes our observations of jurisdictional wetlands, streams
and buffers on or within 200’ of Parcel #3123059119, located off S. 55th
Street in the City of Renton, Washington (the “site”).
Above: iMap Vicinity Map of the site
The irregular shaped 2.25 acre site is located in the SE ¼ of Section 31,
Township 23 North Range 5 East of the W.M. and is bounded by South
55th Street on the south.
Sewall Wetland Consulting, Inc.
PO Box 880 Phone: 253-859-0515
Fall City, WA 98024
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 2
METHODOLOGY
Ed Sewall of Sewall Wetland Consulting, Inc. inspected the site April 25,
2024. The site was reviewed using methodology described in the Corps
of Engineers Wetlands Delineation Manual (Environmental Laboratory,
1987), and the Western Mountains, Valleys and Coast region Supplement
(Version 2.0) dated June 24, 2010, as required by the US Army Corps of
Engineers. Soil colors were identified using the 1990 Edited and Revised
Edition of the Munsell Soil Color Charts (Kollmorgen Instruments Corp.
1990).
Above: iMap Vicinity Map of the site
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 3
OBSERVATIONS
Existing Site Documentation.
Prior to visiting the site, a review of several natural resource inventory
maps was conducted including the National Wetland Inventory Map and
the NRCS Soil Survey online mapping and Data and the King County
iMap website with wetland and stream layers activated and WADNR
Fpars website.
King County iMap
The King County iMap website with wetland and stream layers activated
depicts no wetlands or streams on or near the site (see image page 2 of
this report).
Above: King County iMap image with wetland and stream layers activated.
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 4
Soil Survey
According to the NRCS Soil Mapper, the site is mapped as moderately
well drained Alderwood gravelly sandy loam. Alderwood soils are not
considered to be a hydric (or wetland) soil.
Above: USDA Soil Survey Map of the site
National Wetlands Inventory (NWI)
According to the NWI map for the site, there are no wetlands on or near
the site.
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 5
Above: National Wetlands Inventory Map of the site.
WADNR Fpars Stream Mapping
According to the WADNR Fpars stream map, there are no streams on or
near the site.
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 6
Above: WDFW Fpars stream mapping
Field observations
The site consists of a hillside sloping from a high point on he east to a
low point on the west. Historically it appears a home or structure was
located along the western side of the site on a historically graded flat
area. There is also a large borrow pit in the northeast corner of the site.
Review of the 1936 aerial photograph reveal an old gravel road or path
coming from the southwest and crossing the site to the borrow pit area.
The site is bordered by single family homes to the east and west, SE 55th
Street to the south, and forested area to the north. A roadside ditch
running along SE 55th above the site discharges through a ditch along
the south side of the site and then is picked back up by storm drains.
The flat area on the western side of the site that was historically graded
and contained a structure as evidenced by a concrete slab and other
disturbance. This area has small cottonwood trees with Himalayan
blackberry, Indian plum and some hazelnut.
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 7
Above: King County iMap Lidar depiction of the site.
Above: King County iMap 1936 aerail photograph of the site.
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 8
The remainder of the forested site is vegetated with thickets of
blackberry under a mixed overstory of big leaf maple and Douglas fir.
Understory species include Himalayan blackberry, Indian plum,
hazelnut, sword fern and creeping blackberry.
Soil pits excavated throughout the site generally have dry, gravelly sandy
soils with high chromas similar to the profile description of the
Alderwood soil series. Soils throughout the site were dry during the time
of our field investigation in the early growing season.
No areas of wetland vegetation or wetland conditions were found on or
near the site. No streams were found on or near the site.
Conclusion
No wetlands, streams or buffers are located on the site.
If you have any questions in regards to this report or need additional
information, please feel free to contact me at (253) 859-0515 or at
esewall@sewallwc.com .
Sincerely,
Sewall Wetland Consulting, Inc.
Ed Sewall
Senior Wetlands Ecologist PWS #212
Attached: Data sheets
Talbot Hills/#23-126
Sewall Wetland Consulting, Inc.
September 11, 2024
Page 9
REFERENCES
Cowardin, L., V. Carter, F. Golet, and E. LaRoe. 1979. Classification of
Wetlands and Deepwater Habitats of the United States. U.S. Fish and
Wildlife Service, FWS/OBS-79-31, Washington, D. C.
Environmental Laboratory. 1987. Corps of Engineers Wetlands
Delineation Manual, Technical Report Y-87-1. U. S. Army Corps of
Engineers Waterways Experiment Station, Vicksburg, Mississippi.
Muller-Dombois, D. and H. Ellenberg. 1974. Aims and Methods of
Vegetation Ecology. John Wiley & Sons, Inc. New York, New York.
Munsell Color. 1988. Munsell Soil Color Charts. Kollmorgen
Instruments Corp., Baltimore, Maryland.
National Technical Committee for Hydric Soils. 1991. Hydric Soils of the
United States. USDA Misc. Publ. No. 1491.
Reed, P., Jr. 1988. National List of Plant Species that Occur in
Wetlands: Northwest (Region 9). 1988. U. S. Fish and Wildlife Service,
Inland Freshwater Ecology Section, St. Petersburg, Florida.
Reed, P.B. Jr. 1993. 1993 Supplement to the list of plant species that
occur in wetlands: Northwest (Region 9). USFWS supplement to Biol.
Rpt. 88(26.9) May 1988.
USDA NRCS & National Technical Committee for Hydric Soils, September
1995. Field Indicators of Hydric Soils in the United States - Version 2.1
Project/Site:,
Applicant/Owner:.
Investigators): _
WETLAND DETERMINATION DATA FORM - Western Mountains, Valleys, and Coast Region
T^Wf WJ\S Citv/Countv: Sampling Date:. H'2S'Z3
State: Sampling Point:,
Landfomi (nitlslope, terrace, etc.):
Subregion (LRR):
Soil Map Unit Name:
Lat:
Section, Township, Range: ,
. Local relief (concave, convex, none):.
Long:
NWI classification:,
_ Slope (%):,
Datum:
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.
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.
Hydroohvtic Veaetation Present? Yes *^No
Hvdnc 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.
Tree Stratum (Plot size:.
1. /g^-^cs
2.
3
4.
Absolute
52?
Dominant Indicator
•Spffitffil? Status
Sapling/Shrub Stratum (Plot size:.
2.
3.
4.
5.
3^
' Total Cover
Herb Stratum (Plotsize:.
1- J±
2.
3.
4.
5.
6.
7.
8
9.
10.
11.
> Total Cover
Total Cover
Woodv Vjne 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:
Total Number of Dominant
Species Across Ail Strata:
Percent of Dominant Species
That Are OBL, FACW, or FAC:
(A)
<B>
(A®)
Prevalence Index worksheet:
I^l.l.Co.yg„of:„„„
OBL species
FACW species
FAC species
FACU species
UPL species
Column Totals:
MuWiPly PY
x1 «
x2 =
x3=*
X4 =
x5 =
(A)
Prevalence Index = B/A =
Hydrophy lytic Vegetation Indicators:
'Dominance Test is >S0%
^ Prevalence Index is S3.01
Morphological Adaptations' (Provide supporting
data in Remarks or on a separate sheet)
Wetland Non-Vascular Plants'
„ Problematic Hydrophyte Vegetation' (Explain)
'indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Hydrophytic
Vegetation
Present? Yes. No.
Remarks:
US Army Corps of Engineers Western Mountains, Valleys, and Coast - Interim Version
SOIL Sampling Point ^fc^j
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth MaJOS Redox Features
Color (moist) %
/4> Z£*£h
Color (moist) .%— Type' Texture Remarks
.'Type; C=Ck>rroentratipn, D=DepteMon, RM»Reduced Matrix, CS"Covered or Coated Sand Grains, f tocatton: FL=Pore Lining, M»Matrix
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.)
Histosoi(A1)
Histic Epipedon (A2)
Black Histic (A3)
Hydrogen Sulfide (A4)
Depleted Below Dark Surface (A 11)
Thick Dark Surface (A12)
Sandy Mucky Mineral (S1)
Sandy Gleyed Matrix (S4)
Sandy Redox (S5)
Stripped Matrix (S6)
Loamy Mucky Mineral <F1) (except MLRA1)
_ Loamy Gleyed Matrix (F2)
Depleted Matrix (F3)
Redox Dark Surface (F6)
Depleted Dark Surface (F7)
Redox Depressions (F8)
Indicators for Problematic Hydric Soils':
2 cm Muck (A10)
Red Parent Material (TF2)
Other (Explain in Remarks)
'Indicators of hydrophyUc vegetation and
wetland hydrology must be present,
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)
Surface Water (A1)
High Water Table (A2)
Saturation (A3)
Water Marks (81)
Sediment Deposits (B2)
Drift Deposits (83)
Algal Mat or Crust (84)
Iron Deposits (B5)
Surface Soil Cracks (B6)
Inundation Visible on Aerial Imagery (B7)
Sparsely Vegetated Concave Surface (B8)
Water-Stained Leaves (89) (except MLRA
1.2.4A, and 4B)
Salt Crust (Bit)
Aquatic invertebrates (B13)
Hydrogen Sulfide Odor (C1)
Oxidized Rhizospheres along Living Roots (C3)
Presence of Reduced iron (C4)
Recent Iron Reduction in Tilled Soils (C6)
Stunted or Stressed Plants (D1) (LRR A)
Other (Explain in Remarks)
Secondary Indicators (2 or more required)
Water-Stained Leaves (B9) (MLRA 1,2,
4A, and 48)
Drainage Patterns (810)
Dry-Season Water Table (C2)
Saturation Visible on Aerial Imagery (C9)
Geomorphic Position (D2)
Shallow Aquitand (D3)
FAC-Neutral Test (D5)
Raised Ant Mounds (06) (LRR A)
Frost-Heave Hummocks (D7)
Field Observations:
Surface Water Present? Yes.
Water Table Present? Yes.
Saturation Present? Yes.
(includes capillary fringe)
No __j^^bepth (inches):
No __^Oepth (inches):
No Depth (inches); Wetland Hydrology Present? Yes. No.
Describe Recorded Data (stream gauge, monitoring welt, aerial photos, previous inspections), if available:
Remarks:
US Army Corps of Engineers Western Mountains, Valleys, and Coast - Interim Version
ProjectfSite: „
Applicant/Owner:
Investigators) _
WETLAND DETERMINATION DATA FORM - Western Mountains, Valleys, and Coast Region
7^W>f fVllS CiWCoMr*,: SampBnaDate:. ^'^^
State: tA/A~ Sampling Point:
Landform (hillslope, terrace, etc):
Subregkm (LRR).
SoN Map Urtt Name:
Lat:
Section, Township, Range:
. Local relief (concave, convex, none):,
Long:
NWI classification:.
_ Slope (%):,
Datum:
Are climatic / hydroiogic 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 m Remarks,)
SUMMARY OF FINDINGS - Attach site map showing sampling point locations, transects, important features, etc.
Hvdroonvtic Veaetation Present** Yes No <s
Hydric Soil Present? Yes No S ^
Is the Sampled Area
within a Wetland? Yes No ^—
Wetland Hydrology Present? Yes No ^ wiMIItl *r WlOWOl IU J lea IW
Remarks:
VEGETATION - Use scientific names of plants.
Tree Stratum (Plot size:,
Absolute Dominant Indicator
% Cover Species? Status
5^ I^ASU
,,, (Plotsize:
Z3
•Total Cover
.» Total Cover
H^Sflfnjrn (Plot size:
1.
2.
3.
4.
5.
7.
8.
9.
10.
11.
'Total Cover
W^^.VMS^ftm (Plot size:.
1.
2.
* Total Cover
% Bare Ground in Herb Stratum.
Remarks:
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW, or FAC:
Total Number of Dominant
Species Across All Strata:
Percent of Dominant Species
That Are OBL, FACW, or FAC:
<A)
IMS)
Prevalence Index worksheet:
T^..fc,cpm#
OBL species
FACW species
FAC species
FACU species
UPL species
Column Totals:
Multiply bv
x 1 *.
x2=.
x3».
x4 « .
x6= ,
(A) ,
Prevalence Index = BAA =
Hydrophytic Vegetation indicators:
Dominance Test is >50%
Prevalence Index ts S3 0'
Morphological Adaptations' (Provide supporting
data in Remarks or on a separate sheet)
Wetland Non-Vascular Plants1
Problematic Hydrophytic Vegetation' (Explain)
'indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic
Hydrophytic
Vegetation
Present? Yes. No.
US Army Corps of Engineers Western Mountains, Valleys, and Coast - Interim Version
SOIL Sampling Point:
Profile Description:
Depth
(Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Matrix Redox features
% •Jyjie L2£l
'Type: C=Cor^ntration, psDeptetion, RM=Reduced Matrix, CS»Coyefed or Coated Sand Grains. 'Location: PL«Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all
Histosol (A1)
Histic Eptpedon (A2)
Black Histic (A3)
Hydrogen Sulfide (A4)
Depleted Below Dark Surface (A11)
Thick Dark Surface (A12)
Sandy Mucky Mineral (S1)
Sandy Gleyed Matrix (S4)
LRRs, unless otherwise rioted.)
Sandy Redox (S5)
Stripped Matrix (S6)
Loamy Mucky Mineral (F1) (except MLRA 1)
Loamy Gleyed Matrix (F2)
Depleted Matrix (F3)
Redox Dark Surface (F6)
Depleted Dark Surface (F7)
Redox Depressions (F8)
Indicators for Problematic Hydric Soils':
2cmMuek(A10)
Red Parent Material (TF2)
Other (Explain in Remarks)
Indicators of hydrophytic vegetation and
wetland hydrology must be present,
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)
Surface Water (A1)
_ High Water Table (A2)
Saturation (A3)
Water Marks (81)
Sediment Deposits (B2)
Drift Deposits (B3)
Algal Mat or Crust <B4)
Iron Deposits (B5)
Surface Soil Cracks (B6)
Inundation Visible on Aerial Imagery (B7)
Sparsely Vegetated Concave Surface (B8)
Water-Stained Leaves (89) (except MLRA
1,2, 4A, and4B)
Salt Crust (811)
Aquatic Invertebrates (813)
Hydrogen Sulfide Odor <C1)
Oxidized Rhizospheres along Living Roots (C3)
Presence of Reduced iron (C4)
Recent Iron Reduction In Tilled Soils (C8)
Stunted or Stressed Plants (01) (LRR A)
Other (Explain in Remarks)
Secondary Indicators (2 or more required)
Water-Stained Leaves (B9) (MLRA 1, 2,
4A, and 4B)
Drainage Patterns (B10)
Dry-Season Water Table (C2)
Saturation Visible on Aerial Imagery (C9)
Geomorphic Position (D2)
Shallow Aquitard (D3)
FAC-Neutral Test(D5)
Raised Ant Mounds (D8) (LRR A)
Frost-Heave Hummocks (D7)
Field Observations:
Surface Water Present? Yes.
Water Table Present? Yes _
Saturation Present? Yes.
(includes capillary fringe)
No.
No.
No
J^^epth (inches):
(inches):.
Depth (inches):. Wetland Hydrology Present? Yes. No.
Describe Recorded Data (stream gauge, monitoring welt, aerial photos, previous inspections), if available:
Remarks:
US Army Corps of Engineer* Western Mountains, Valleys, and Coast - Interim Version
Project/Site:
Applic_»nt/Owner;
Investigators): _
WETLAND DETERMINATION DATA FORM - Western Mountains, Valleys, and Coast Region
T^M~ f-V/lS Citv/Countv: fcrfo*' Sampii^ Date: _________^3
State: _______ Sampfing Point: A^7/^ _3
Landform (hiltelope. terrace, etc):
Subregion (LRR):
So* Map Unit Name:
Lat:
Section, Township, Range:
. Local relief (concave, convex, none):
Long:
NWI classification..
_ Slope (%):.
Datum:
Are climatic / hydrotogic 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 >S
Is the Sampled Area ^
within a Watland? Yes No
Wettand Hydrology Present? Yes No -**^ VTIttVHI O f tvlMIl i\M m • «9 IWI
Remarks:
VEGETATION - Use scientific names of plants.
Tree Stratum (Plot size: _
2.
3.
Absolute
) , %Qgm,
Dominant Indicator
Sjffiojes? Statu.*
7^
Saijr^h^b,^ (Plot size:,
1. <^_y>^ /c^T <T •
2 - ^
3. _
4. _
5. _
. K Total Cover
. = Total Cover
Herb Stratum (Plot size
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
'Total Cover
Woodv Vme Stratum (Plot size:
1.
2.
* Total Cover
% Bare Ground in Herb Stratum.
Remarks:
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW. or FAC:
Total Number of Dominant
Species Across All Strata:
Percent of Dominant Species
That Are OBL, FACW, or FAC:
C3
1
(A)
(B)
(A/B)
Prevalence Index worksheet:
Covet of; _
OBL species
FACW species
FAC species
FACU species
UPL species
Column Totals:
Multiply by
x 1 *,
x2 = .
x3=>
x4« .
xS= .
(A) . (8)
Prevalence Index = B/A =
Hydrophytic Vegetation Indicators:
Dominance Test is >50%
Prevalence Index ts S3.0'
Morphological Adaptations' (Provide supporting
data in Remarks or on a separate sheet)
Wetland Non-Vascular Plants'
Problematic Hydrophytic Vegetaton1 (Explain)
'Indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Hydrophytic
Vegetation
Present? Yes. No.
US Army Corps of Engineers Western Mountains, Valleys, and Coast - Interim Version
SOIL Sampling Point;
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
finches) Color (motsp % Color (moist) % Type' Loc* Texture Remarks
'Type: C=Concentratipn, D=Oeptetion, RM»Reduced Matrix, CS*Covered or Coated Sar^ Grains. 'location: PL=Pore Lining, M-Matrix.
Hydric Soil Indicators: (Applicable to all
Hislosol (A1)
Histic Epipedon (A2)
Black Histic (A3)
, Hydrogen Sulfide (A4)
Depleted Below Dark Surface (All)
Thick Dark Surface (A12)
Sandy Mucky Mineral (S1)
Sandy Gleyed Matrix (S4)
LRRs, unless otherwise noted.)
Sandy Redox (SS)
Stripped Matrix (S6)
Loamy Mucky Mineral (F1) (except MLRA 1)
Loamy Gleyed Matrix (F2)
Depleted Matrix (F3)
Redox Dark Surface (F6>
Depleted Dark Surface (F7)
Redox Depressions (F8)
Indicators for Problematic Hydric Soils
2 cm Muck (A10)
Red Parent Material (TF2)
Other (Explain in Remarks)
indicators of hydrophytic vegetation and
wetland hydrology must be present,
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)
Surface Water (Al)
High Water Table (A2)
Saturation (A3)
Water Marks (B1)
Sediment Deposits (B2)
Drift Deposits (B3)
Algal Mat or Crust (84)
Iron Deposits (B5)
Surface Soil Cracks (B6)
Inundation Visible on Aerial Imagery (87)
Sparsely Vegetated Concave Surface (88)
Water-Stained Leaves (B9) (except MLRA
1,2, 4A, and4B)
Salt Crust (811)
Aquatic invertebrates (B13)
Hydrogen Sulfide Odor (C1)
Oxidized Rhizospheres along Living Roots (C3)
Presence of Reduced Iron (C4)
Recent Iron Reduction in Tilled Soils (C6)
Stunted or Stressed Plants (D1) (LRR A)
Other (Explain in Remarks)
Secondary Indicators (2 or more required)
Water-Stained Leaves (89) (MLRA 1, 2,
4A, and 48)
Drainage Patterns (810)
Dry-Season Water Table (C2)
Saturation Visible on Aerial Imagery (C9)
Geomorphic Position (D2)
Shallow Aquitard (D3)
FAC-NeutraITest(D5)
Raised Ant Mounds (D6) (LRR A)
Frost-Heave Hummocks (D7)
Field Observations:
Surface Water Present? Yes.
Water Table Present? Yes,
Saturate Present? Yes.
(includes capillary fringe)
No ____/B*pth (inches):
No ____^0<pth (inches):
No Depth (inches): Wetland Hydrology Present? Yes.
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks:
US Army Corps of Engineers Western Mountains. Valleys, and Coast - Interim Version