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REVIEWED RESUB1 BLD2023-1421+Wetland and Stream+3.8.2024_7.46.32_AM+4112964Altmann Oliver Associates, LLC AOA PO Box 578 Carnation, WA 98014 Office (425) 333-4535 Fax (425) 333-4509 January 31, 2024 Robin Michel rwmichell@me.com Environmental Planning & Landscape Architecture AOA-7325 SUBJECT: Wetland and Stream Reconnaissance for Hamby Residence 7824 — 175th Street SW, Edmonds, WA (BLD2023-1421) Parcel 00679200000200 Dear Rob On January 17, 2024, AOA conducted a wetland and stream reconnaissance on and adjacent to 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). The site is currently developed with a single-family residence and associated yard areas consisting of ornamental landscape beds, driveway, patio, and mowed lawn. No definitive hydrophytic plant communities were observed on -site. Attachment A contains a data sheet prepared for a representative location in the upland on the site. This data sheet documents the vegetation, soils, and hydrology information that aided in the no wetland determination. Although no wetlands or streams were identified on -site, two streams were identified within the proximity of the parcel. Perrinville Creek is located off -site to the southwest and is approximately 262 feet from the parcel. Perrinville Creek is considered a Type F stream and therefore requires a likely 100-foot buffer per ECDC 23.90.040.D.1.b. This buffer is well away from the subject property. The second stream, Terrace Creek, flows north off -site to the northeast of the parcel and is approximately 123 feet from the subject property. Due to the steepness of the gradient of the channel, Terrace Creek in the vicinity of the site would likely be considered a Type Np (50-foot buffer) or Ns (40-foot buffer). However, even if the stream were considered a Type F with anadromous fish use (unlikely) the required 100-foot buffer would not encroach into the subject property. Robin Michel January 31, 2024 Page 2 Conclusion No wetlands or streams are located on the site and no buffers from off -site streams encroach into the subject property. If you have any questions regarding the reconnaissance, please give me a call. Sincerely, ALTMANN OLIVER ASSOCIATES, LLC John Altmann Ecologist Attachments f City of Edmonds Map Title Legend Creeks Wetlands Wetlands Boundary Wetland Boundaries Not Completel Wetland Known Extents Contour Lines 10 50; 100 ArcSDE.GIS.STREET CENTERLINE; <all other values> 1 2 5; 4 9;71;7;8 Sections Boundary Sections Edmonds Boundary or ArcSDE.GIS.PROPERTY BUILDING ArcSDE.GIS.STREET CENTERLINE' <all other values> Interstate Principal Arterial Minor Arterial; Collector Local Street State Highways <all other values> Notes 0 63.15 126.3 Feet 94.0 This ma is a user generated static output from an Internet mapping site and is for ���2$ P� B P PP B reference only. Data layers that appear on this map may or may not be accurate, WGS_1984_Web_Mercator_Auxiliary_Sphere current, or otherwise reliable. © City of Edmonds THIS MAP IS NOT TO BE USED FOR DESIGN OR CONSTRUCTION Altmann Oliver Associates, LLc AOA PO Box 578 Camation, RA 98014 Office (425) 333-4535 Fax (425) 333-4509 Environmental Planning & City of Edmonds Landscape AOA-7325 Architecture Parcel: 00679200000200 Critical Areas Map U /Approximate uata riot Locauons Approximate Type F Stream Approximate Type N Stream 0 30 60 120 180 240 Ar US Feet C ATTACHMENT A DATA SHEETS WETLAND DETERMINATION DATA FORM —Western Mountains, Valleys, and Coast Region Project Site: Parcel 00679200000200 City/County: Edmonds/ Sampling Date: 1-17-24 Applicant/Owner: Hamby State: WA Sampling Point: DP#1 Investigator(s): John Altmann, Dain Altmann, Jason Panzera Section, Township, Range: 2704074 Landform (hillslope, terrace, etc.): flat Local relief (concave, convex, none): none Slope (%): Subregion (LRR): A Let: 47.840799 Long:-122.341133 Datum: Soil Map Unit Name: 19 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 ED Hydric Soil Present? Yes ❑ No ❑ Is the Sampled Area Yes ❑ No ED within a Wetland? Wetland Hydrology Present? Yes ❑ No ED Remarks: Upland plot, see map for location. Soils highly disturbed, use vegetaiton and hydrology indacators for wetland determination. VEGETATION — LIcP cr_ipntifin namPc of nlantc Tree Stratum (Plot size: 10) Absolute Dominant Indicator Dominance Test Worksheet: % Cover Species? Status 1. Pseudotsuga menziesh 20 ves FACU Number of Dominant Species 2. Prunus laurocerasus 20 ves NL (UPL) 2 That Are OBL, FACW, or FAC: (A) 3. Total Number of Dominant 5 (B) q Species Across All Strata: 50% = 20, 20% = 8 40 = Total Cover Percent of Dominant Species Saplinq/Shrub Stratum (Plot size: 10) That Are OBL, FACW, or FAC: 40 (A/B) Prevalence Index worksheet: 1. Rubus armeniacus 5�es FAC 2. Total % Cover of: Multiply by: 3. OBL species x1 = 4. FACW species x2 = 5. FAC species x3 = 50% = 2_5, 20% = 1 5 = Total Cover FACU species x4 = Herb Stratum (Plot size: 10) UPL species x5 = 1. Poa pratensis 95ves FAC Column Totals: (A) (B) 2. Geranium robertianum 5 no FACU Prevalence Index = B/A = Hydrophytic Vegetation Indicators: 3. 4. ❑ 1 — Rapid Test for Hydrophytic Vegetation 5. ❑ 2 - Dominance Test is >50% 6. ❑ 3 - Prevalence Index is <3.0' 7. ❑ 4 - Morphological Adaptations' (Provide supporting 8, data in Remarks or on a separate sheet) 9. ❑ 5 - Wetland Non -Vascular Plants' 10. ❑ Problematic Hydrophytic Vegetation' (Explain) 11. 50% = 50, 20% = 20 100 = Total Cover 'Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. Woody Vine Stratum (Plot size: 10) 1. Hedera helix 10 eves FACU 2 Hydrophytic Vegetation Yes El No 50% = 5, 20% = 2 10 =Total Cover Present? % Bare Ground in Herb Stratum Remarks: mowed lawn US Army Corps of Engineers Western Mountains, Valleys, and Coast — Version 2.0 Project Site: Parcel 00679200000200 SOIL Samolino Point: DP#1 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) % Type' Loc' Texture Remarks 0-16 sand sandy conglomerate fill 'Type: C= Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. ZLocation: PL=Pore Lining, M=Matrix Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: ❑ Histosol (At) ❑ 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 (At 1) ❑ Depleted Matrix (F3) ❑ Thick Dark Surface (Al2) ❑ Redox Dark Surface (F6) ❑ Sandy Mucky Mineral (S1) ❑ Depleted Dark Surface (F7) 31ndicators of hydrophytic vegetation and wetland hydrology must be present, ❑ Sandy Gleyed Matrix (S4) ❑ Redox Depressions (F8) unless disturbed or problematic. Restrictive Layer (if present): Type: Depth (inches): Hydric Soils Present? Yes ❑ No ❑ Remarks: Soils highly disturbed. Use vegetation and hydrology indicators for wetland dermination. :YJ0Ye]119ZH1 Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (2 or more required) ❑ Surface Water (Al) ❑ Water -Stained Leaves (69) ❑ Water -Stained Leaves (69) ❑ High Water Table (A2) (except MLRA 1, 2, 4A, and 46) (MLRA 1, 2, 4A, and 46) ❑ Saturation (A3) ❑ Salt Crust (B11) ❑ Drainage Patterns (1310) ❑ Water Marks (61) ❑ Aquatic Invertebrates (1313) ❑ Dry -Season Water Table (C2) ❑ Sediment Deposits (132) ❑ Hydrogen Sulfide Odor (Cl) ❑ Saturation Visible on Aerial Imagery (C9) ❑ Drift Deposits (63) ❑ Oxidized Rhizospheres along Living Roots (C3) ❑ Geomorphic Position (D2) ❑ Algal Mat or Crust (64) ❑ Presence of Reduced Iron (C4) ❑ Shallow Aquitard (D3) ❑ Iron Deposits (135) ❑ Recent Iron Reduction in Tilled Soils (C6) ❑ FAC-Neutral Test (D5) ❑ Surface Soil Cracks (66) ❑ Stunted or Stresses Plants (D1) (LRR A) ❑ Raised Ant Mounds (D6) (LRR A) ❑ Inundation Visible on Aerial Imagery (137) ❑ Other (Explain in Remarks) ❑ Frost -Heave Hummocks (D7) ❑ Sparsely Vegetated Concave Surface (68) Field Observations: Surface Water Present? Yes ❑ No ® Depth (inches): Water Table Present? Yes ❑ No ® Depth (inches): Saturation Present? Yes ❑ No (includes capillary fringe) ® Depth (inches): Wetland Hydrology Present? Yes ❑ No Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: dry US Army Corps of Engineers Western Mountains, Valleys, and Coast — Version 2.0