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HomeMy WebLinkAboutRS_VMAC_Reno+Expand_Stream_Lake_Habitat Studies_251125_v1 Confidential STREAM AND LAKE STUDY AND HABITAT DATA NARRATIVE REPORT SEATTLE SEAHAWKS, VIRGINIA MASON ATHLETIC CENTER RENTON, WASHINGTON Prepared by: Ramboll Americas Engineering Solutions, Inc. Date: November 2025 STREAM AND LAKE STUDY AND HABITAT DATA NARRATIVE REPORT Ramboll Confidential CONTENTS 1. INTRODUCTION 1 1.1 Project Description 1 1.2 Local Regulations 2 2. STANDARD STREAM OR LAKE STUDY NARRATIVE 4 2.1 Stream or Lake Classification 4 2.2 Vegetative Cover 4 2.3 Ecological Function 5 2.4 Fish and Wildlife 6 2.4.1 Mammals 6 2.4.2 Birds 6 2.4.3 Amphibians and Reptiles 6 2.4.4 Fish and Invertebrates 6 2.5 Measures to Protect Trees and Vegetation 7 2.6 No Net Loss of Ecological Function 7 3. HABITAT DATA NARRATIVE 7 3.1 Habitat Diversity 8 3.2 Migration Corridors 9 3.3 Vegetative Cover Types and Associated Species 9 3.4 Disturbed Areas 10 3.5 Existing Habitat Functions and Values 10 3.6 Proposed Habitat Alterations 10 4. REFERENCES 11 Confidential TABLES Table 1: Habitat and Species Present on Site FIGURES Figure 1: Site Map Figure 2: Waters and Shoreline Jurisdiction Figure 3: Site Topography Figure 4: Vegetation Types on Site APPENDICES Appendix A: IPaC Species List from Washington Fish and Wildlife Office Appendix B: City of Renton Correspondence Appendix C: Photographic Log STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 1 Confidential 1. INTRODUCTION 1.1 Project Description Ramboll Americas Engineering Solutions, Inc. (Ramboll) was tasked with assisting the client with the City of Renton’s Environmental Review Submittal Requirements (RMC 4-9-070) on behalf of the Seattle Seahawks (“Seahawks”). The Site (“Site”) is located at 12 Seahawks Way in Renton, Washington. The Site is currently used as the Seattle Seahawks training facility and comprises one parcel, totaling approximately 17 acres. The facility includes the Virigina Mason Athletic Center (“VMAC”, also “the Project Area”) and a sports field for training. The western site boundary runs along Lake Washington; other boundaries border Seahawks Way and residential areas. Figure 1 shows the Site Boundary and the Project Area. Per the City of Renton’s Environmental Review Submittal Requirements items 20 and 24, Ramboll’s qualified ecologists performed a Standard Stream or Lake Study and Habitat Assessment at the Site and Project Area. The study was to identify the extent to which the project may adversely affect endangered and threatened species or habitats and propose mitigations. In addition, the habitat assessment identifies areas of critical habitat and how they may be affected by the development project. Preceding the biological assessment field work, Ramboll performed a preliminary desktop review of the potential for the project to impact state or federally listed species of fish including Chinook salmon, bull trout, and steel head trout. The desktop review also included the potential impact to new, rare, or other endangered species habitat, such as habitat for bald eagles (Appendix A). While endangered fish species may be in Lake Washington, the construction area is approximately 400 feet from the lakeshore, and neither the lakeshore nor the lake will be affected by the project. No Biological Assessment or Critical Area Study was needed for the site per communication with the City of Renton Planning Department (Appendix B) because there are no known bald eagle nesting sites near the construction area, and no other listed species are likely on the Site. The Site, formally known as the North and South Baxter site, underwent remedial actions under Prospective Purchaser Consent Decrees approved by the Washington Department of Ecology in April 2000. These actions aimed to improve water quality in Lake Washington. In 2000, as part of the remediation, the entire site was capped to within 25 feet of the shoreline, which required eliminating a 125-foot open section of the unnamed stream, formally referred to on-site as the constructed Gypsy Subbasin Drainage. This unnamed stream, previously conveyed through a deteriorating culvert, was upgraded and replaced to meet future capacity needs. In 2006, to accommodate the construction of the Seahawks Headquarters building, the culvert was rerouted around the building’s foundation and extended from 490 to approximately 695 feet. Additionally, the outfall pipeline to Lake Washington was relocated and replaced with a 25-foot open vegetated channel in the Lake (Appendix C, Photos 5 and 6). The shoreline was also restored with native shrubs and trees, replacing exotic plant species to enhance the riparian zone. For the current project, the Seahawks plan to expand their training facility on the southeast side of VMAC within the pre-existing property boundary (Figure 1). This expansion requires additional STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 2 Confidential environmental review per the City of Renton’s Environmental Review Submittal Requirements. Planned construction activities are confined to the east side of the Virginia Mason Athletic Center building, well away from the shoreline and critical habitat areas. 1.2 Local Regulations Under the Renton Municipal Code (RMC) 4-8-120C (Submittal Requirements – Specific to Application Type: Land Use Applications) and 4-9-190 (Shoreline Substantial Development Permit Review Process) the City of Renton requires the following environmental reports to be included with the permit application submittal for the project: Standard Stream or Lake Study: A report shall be prepared by a qualified biologist and include the following information: a. Site Map: Site map(s) indicating, at a scale no smaller than one inch equals twenty feet (1" = 20') (unless otherwise approved by the Community and Economic Development Administrator): • The entire parcel of land owned by the applicant, including one hundred feet (100') of the abutting parcels through which the water body(ies) flow(s); • The ordinary high water mark (OHWM) determined in the field by a qualified consultant pursuant to RMC 4-3-0S0G7, Streams and Lakes, (the OHWM must also be flagged in the field); • Stream or lake classification, as recorded in the City of Renton's COR Maps, the City's online interactive mapping application available through the City's website, for the City of Renton Water Class or RMC 4-3- 090 if unclassified, see "Supplemental Stream or Lake Study" below); • Topography of the site and abutting lands in relation to the stream(s) and its/their buffer(s) at contour intervals of two feet (2') where slopes are less than ten percent (10%), and of five feet (S') where slopes are ten percent (10%) or greater; • One hundred (100) year floodplain and floodway boundaries, including one hundred feet (100') of the abutting parcels through which the water body(ies) flow(s); • Site drainage patterns, using arrows to indicate the direction of major drainage flow; • Top view and typical cross-section views of the stream or lake bed, banks, and buffers to scale; • The vegetative cover of the entire site, including the stream or lake, banks, riparian area, and/or abutting wetland areas, extending one hundred feet (100') upstream and downstream from the property line. Include position, species, and size of all trees of at least six inch (6") caliper and larger, fifty four inches (54") above grade, and the location, size and species of all protected trees on the site that are within one hundred feet (100') of the OHWM, and the location of measures to protect trees on and abutting the site; • The location, width, depth, and length of all existing and proposed structures, roads, stormwater management facilities, wastewater treatment and installations in relation to the stream/lake and its/ their buffer(s); and • Location of site access, ingress and egress. STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 3 Confidential b. Grading Plan: A grading plan prepared in accordance with RMC 4-8-120D7, and showing contour intervals of two feet (2') where slopes are less than ten percent (10%), and of five feet (S') where slopes are ten percent (10%) or greater. c. Stream or Lake Assessment Narrative: A narrative report, formatted to eight and one-half inches (8.5") by eleven inches (11"), shall be prepared to accompany the site plan and describes: • The stream or lake classification as recorded in the City of Renton's COR Maps, the City's online interactive mapping application available through the City's website, for the City of Renton Water Class or RMC 4-3-090; • The vegetative cover of the site, including the stream or lake, banks, riparian area, wetland areas, and flood hazard areas extending one hundred feet (100') upstream and downstream from the property line, including the impacts of the proposal on the identified vegetation; • The ecological functions currently provided by the stream/lake and existing riparian area and the impacts of the proposal on the identified ecological functions; • Observed or reported fish and wildlife that make use of the area including, but not limited to, salmonids, mammals, and bird nesting, breeding, and feeding/foraging areas, including the impacts of the proposal on the identified fish and wildlife; • Measures to protect trees, as defined in RMC 4-11-200, and vegetation; and • For shorelines regulated under RMC 4-3-090, Shoreline Master Program Regulations, the study shall demonstrate if the proposal meets the criteria of no net loss of ecological functions as described in RMC 4-3-090D2. If the proposal requires mitigation for substantial impacts to the existing vegetation buffer in order to demonstrate no net loss of ecological functions, a supplemental stream or lake study is required. Habitat Data Report: If the project site contains or abuts a critical habitat per RMC 4-3-0S0G.6, please provide a report containing the following: a. Site Plan: The site plan shall indicate: • The vegetative cover types reflecting the general boundaries of the different plant communities on the site; • The exact locations and specifications for all activities associated with site development including the type, extent and method of operations; • Top view and typical cross-section views of critical habitat/wildlife habitat to scale; • The results of searches of the State Department of Fish and Wildlife's Natural Heritage and Non-Game Data System databases; • The results of searches of the Washington State Department of Fish and Wildlife Priority Habitat and Species database. b. Narrative Report: A narrative report shall be prepared to accompany the site plan which describes: • The layers, diversity and variety of habitat found on the site; • The location of any migration or movement corridors; STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 4 Confidential • The species typically associated with the cover types, including an identification of any critical wildlife species that might be expected to be found; • Identification of any areas that have been previously disturbed or degraded by human activity or natural processes; • A summary of existing habitat functions and values, utilizing a habitat evaluation procedure or methodology approved by the City; • A summary of proposed habitat alterations and impacts and proposed habitat management program. Potential impacts may include but are not limited to clearing of vegetation, fragmentation of wildlife habitat, expected decrease in species diversity or quantity, changes in water quality, increases in human intrusion, and impacts on wetlands or water resources. These assessments and reports are intended to support regulatory approvals required for planned development. Section 2 of this report is the Standard Stream or Lake Study Narrative. Section 3 is the Habitat Data Narrative. 2. STANDARD STREAM OR LAKE STUDY NARRATIVE 2.1 Stream or Lake Classification Both a lake and a stream are found on and within the vicinity of the Site (Figure 2). Lake Washington is classified as a Shoreline of Statewide Significance (Type S) per Renton Municipal Code (RMC) 4-3-090 and is regulated under Renton’s Shoreline Master Program regulations. The unnamed stream on site is a piped stream classified as “waters that are known to be used by fish or meet the physical criteria to be potentially used by fish and that have perennial (year-round) or seasonal flows” (Type F) per RMC 4-4-050 and is regulated under Renton’s Critical Areas regulations. 2.2 Vegetative Cover Ramboll ecologists Carrie Paul-Gorsline and Sam Muir visited the Site on September 26, 2025, to assess vegetative cover across the Site. The field assessment included the Lake Washington shoreline adjacent to and within 100 feet of the Site. Appendix C provides a photographic log depicting habitat conditions and vegetation across the Site. The Site consists of mostly flat topography, with some slopes found along the Lake Washington shoreline, as well as a single sloped grassy area to the southeast of the site (Figure 3). The Project Area is within the existing built environment of the Site and consists primarily of paved concrete and asphalt surfaces with limited ornamental plantings. Ornamental plantings include the following types of tree: Katsura tree (Cercidiphyllum japonicum), black cottonwood (Populus trichocarpa), Pacific madrone (Arbutus menziesii), western red cedar (Thuja plicata), and Douglas fir (Pseudotsuga menziesii). Non-tree species in the ornamental plantings included Nootka rose (Rosa nutkana), Oregon grape (Berberis aquifolium), black mondo grass (Ophiopogon planiscapus), and sword fern (Polystichum munitum). STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 5 Confidential Lake Washington is on the west side of the Site and approximately 400 feet from the Project Area. The riparian zone along the lakefront is a vegetated shoreline dominated by black cottonwood and Sitka spruce (Picea sitchensis), vine maple (Acer circinatum), and Sitka willow (Salix sitchensis) in the tree and shrub stratum. Other dominant plant species included reed canary grass (Phalaris arundinacea), common horsetail (Equisetum arvense), Himalayan blackberry (Rubus armeniacus), salmonberry (Rubus spectabilis) and snowberry (Symphoricarpos albus). There is no vegetative cover associated with the unnamed stream, since it is contained in a pipe below ground, and covered by an impermeable sidewalk. At the outfall of the unnamed stream to Lake Washington, there is limited herbaceous groundcover including Sitka willow, snowberry, and reed canary grass. 2.3 Ecological Function Due to previous development, the unnamed stream has been completely enclosed within a pipe, leaving only its outfall to Lake Washington exposed. With the stream no longer interacting with adjacent soils or vegetation, the suite of riparian-driven functions has been significantly reduced. Natural filtration, nutrient uptake, and sediment trapping are now negligible. Water quality depends almost entirely on upstream source-control measures and constructed stormwater facilities. Because the flow is sealed in pipe runs, inputs of leaf litter, insects, and large woody debris have effectively ceased, and the buried channel offers no habitat or microclimatic moderation. Channel migration and bank-stability dynamics have been reduced to local scour at pipe outlets. The culvert itself and perimeter fencing currently exclude public access. In short, enclosure of the unnamed stream has reduced its ecological functions to residual water-conveyance alone. On the Site, ecological value persists only along the Lake Washington shoreline riparian area. In 2006, the Lake Washington shoreline planting plan was developed to enhance ecological functions and habitat value along the shoreline. Approximately 1.23 acres of vegetated area within 100 feet of the shoreline were maintained or expanded, with non-native shrubs removed and replaced by native species. Tree canopy coverage, originally 0.82 acres, was matched or exceeded. The plan included removal of invasive vegetation, preservation of large existing trees where feasible, and replanting using native Pacific Northwest species. As part of the planting plan, soils were amended as needed, and supplemental watering was provided until vegetative establishment. Vegetation was installed at densities expected to thrive and meet coverage goals within 5 to 10 years. Maintenance is ongoing, with dead or invasive plants removed and selective pruning performed to support understory growth and preserve lake views. Additional planting zones were created around the new Gypsy Subbasin Drainage outfall, using high-density native plantings tailored to the stream channel The Lake Washington shoreline riparian area contributes to the following ecological functions: • Minor amounts of low-diversity organic matter • Nesting and foraging habitat for birds and small mammals • Foraging habitat for larger mammals including deer, coyote, and bobcat (See Section 2.4.1) • Limited capacity to shade or cool the lake STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 6 Confidential • Some erosion control and bank stabilization from fluctuating lake levels and boat wake 2.4 Fish and Wildlife This section addresses fish and wildlife species that were observed during the site visit or are expected to use the Site, including Lake Washington and/or its riparian zones. 2.4.1 Mammals During the site visit, one mammal, the North American river otter (Lontra canadensis), was observed in Lake Washington approximately 200 feet from the site shoreline. Ramboll ecologists also found tracks and scat from both deer (Odocoileus spp.) and coyote (Canis latrans) along the shoreline. Additionally, personnel who work at VMAC have noted recent sightings of bobcats (Lynx rufus). It is likely that common urban mammals such as squirrels (Sciurus carolinensis), raccoons (Procyon lotor), opossums (Didelphis virginiana), rats (Rattus spp.), and mice are also found on site. 2.4.2 Birds A variety of different birds were observed during the site visit, including waterfowl such as mallards (Anas platyrhynchos), great blue heron (Ardea herodias), and Canada goose (Branta canadensis). Common songbirds such as dark-eyed junco (Junco hyemalis), black-capped chickadee (Poecile atricapillus), and Anna’s hummingbird (Calypte anna) were also noted on site. Documented observations by birders in eBird report 157 bird species in the project vicinity over the last two years (eBird 2025). Most of these bird species are common to the area and are expected to forage or nest on or in the vicinity of the Site. Although the bald eagle (Haliaeetus leucocephalus), a species protected by the Bald and Golden Eagle Protection Act, was not observed during the site visit, VMAC personnel noted that bald eagles are commonly spotted on and near the site, but there is no evidence for nesting on the Site. 2.4.3 Amphibians and Reptiles No amphibians or reptiles were observed during the site visit. It is likely that both amphibians (e.g., frogs, toads, newts, and salamanders) and reptiles (e.g., turtles and snakes) utilize the Site. 2.4.4 Fish and Invertebrates No fish were observed in Lake Washington adjacent to the Site during the site visit. Lake Washington provides habitat for numerous fish species, including Chinook (Oncorhynchus tshawytscha), Coho (Oncorhynchus kisutch), and sockeye salmon (Oncorhynchus nerka), steelhead (Oncorhynchus mykiss), cutthroat trout (Oncorhynchus clarkii), bull trout (Salvelinus confluentus), speckled dace (Rhinichthys osculus), three-spine stickleback (Gasterosteus aculeatus), northern squawfish (Ptychocheilus oregonensis), yellow perch (Perca flavescens), black crappie (Pomoxis nigromaculatus), largemouth and smallmouth bass (Micropterus nigricans and dolomieu), mountain whitefish (Prosopium williamsoni), large-scale sucker (Catostomus macrocheilus), longfin smelt (Spirinchus thaleichthys), and prickly sculpin (Cottus asper). Crayfish (Astacidea spp.), freshwater shrimp, and clams are also found in the lake. Chinook salmon and bull trout, both listed under the Endangered STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 7 Confidential Species Act, may occupy nearshore areas adjacent to the site, although the presence of bull trout is unlikely due to the amount of anthropogenic disturbance (WDFW 2025a, WDFW 2025b). The prior development of the unnamed stream has largely reduced or eliminated points of access for wildlife throughout the reach. At the site, the use of underground culverts and a concrete pipe minimize wildlife habitat. Fish are nominally able to access and migrate into the outfall of the stream at Lake Washington but are largely prevented from doing so except when water levels are high enough for fish to swim into the outfall (Appendix C, Photos 5 and 6). In surveys conducted during previous development planning efforts, reports of fish sightings were largely anecdotal and unconfirmed. 2.5 Measures to Protect Trees and Vegetation The project will be confined to the southeast portion of the Site, within the existing built environment and will not affect the shoreline environment where some riparian vegetation and trees are located. No direct or indirect impacts on riparian vegetation or trees will occur because of this project and therefore no measures to protect vegetation or trees have been incorporated into the project design. 2.6 No Net Loss of Ecological Function Since the project will not occur within the riparian zone on the Site, and the unnamed stream on site is below ground, the project will result in no net loss of ecological function in the riparian zone of Lake Washington or along the piped unnamed stream. The Site is primarily flat, given extensive previous grading, and slopes gently down toward the Lake (Figure 3). Approximately 62 trees with a diameter at breast height of six inches or greater will be removed from the upland area of the site in the Project Area. 51 of these trees are deciduous and include Katsura tree, black cottonwood, Pacific madrone, vine maple, silver maple, red maple, and red-osier dogwood. 11 of these trees are coniferous and include western red cedar, and Douglas fir (Appendix C Photos 11-14). There are multiple individuals of the same species elsewhere on the Site. Given that the impervious cover of the Site is expected to increase by less than 3 percent, the ecological function provided by the Site is expected to be very similar pre- and post-construction. Planned construction activities will occur on the southeast side of the VMAC building and will not affect the critical habitat areas identified on or near the Site. All work will be conducted outside designated critical areas, and no secondary impacts are anticipated. The construction zone is approximately 250 feet from designated critical areas and approximately 400 feet from the shoreline, and sediment and erosion control measures will be implemented to prevent any impact on Lake Washington, the unnamed stream, or any other critical areas. 3. HABITAT DATA NARRATIVE Given the site’s proximity to critical habitat, per RMC 4-3-0S0G.6 this section presents the Habitat Data Report Narrative, providing information about areas on and adjacent to the Site, including critical habitat, migration or movement corridors, species associated with vegetation types, areas of human disturbance, current habitat function and values, and proposed habitat alterations. STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 8 Confidential 3.1 Habitat Diversity As described in Section 2.3 of this report, the Site provides a variety of limited ecological functions and diversity. The site includes developed areas and a maintained turf grass field designated for practice activities. Most vegetation surrounding the Virginia Mason Athletic Center consists of ornamental plantings maintained for aesthetic purposes. To the west of the current building and practice field, running from the southern end of the site to the northern, lies a linear natural area characterized by multiple habitat types, including deciduous forest, evergreen forest, shrubland, and grassland (see site plan, Figure 1). The western border of the Site, adjacent to the shoreline, is classified as a critical area by the City of Renton due to its regulated shoreline status. The shoreline is primarily forested, functioning as a riparian zone. Beyond this linear vegetated buffer on the western border, on-site vegetation is minimal and is dominated by grasses interspersed with small ornamental clusters of trees and shrubs. Upland trees and shrubs share similar characteristics with the shoreline vegetation. According to the IPaC database, six federally threatened, endangered, or candidate species have potential presence in the area (Appendix A): marbled murrelet, yellow-billed cuckoo, northwestern pond turtle, bull trout, monarch butterfly, and Suckley’s cuckoo bumble bee. One designated critical habitat for bull trout (Lake Washington) lies within the site boundary. As noted in Section 2.4.4, Lake Washington has the potential to support bull trout in the nearshore habitat adjacent to the site. While bald eagles and Chinook salmon were not listed in the IPaC review, both species are known to inhabit surrounding areas. The forested habitat on-site is relatively young and of low quality, making it unsuitable for nesting by bald eagles or marbled murrelets. The combination of canopy cover and low scrub-shrub vegetation could potentially support yellow-billed cuckoo, although it is unlikely as the species has had incredibly limited sightings in Western Washington (Wiles and Kalasz 2017). Pollinator habitat is limited, reducing suitability for monarch butterflies and bumble bees. Northwestern pond turtles typically occupy streams and lakes, using riparian zones for nesting, which could occur near the site’s shoreline. During the site visit, no threatened or endangered species were observed; however, the habitats on site likely support a variety of birds, mammals, and fish. As noted in Section 2.4, common bird species include mallards, great blue heron, Canada goose, dark-eyed junco, black-capped chickadee, Anna’s hummingbird, and bald eagle. Mammals such as deer, coyote, bobcats, squirrels, raccoons, opossums, and mice are also likely present. Lake Washington provides habitat for numerous fish species, including Chinook, Coho, and sockeye salmon, steelhead, cutthroat trout, bull trout, speckled dace, three-spine stickleback, northern squawfish, yellow perch, black crappie, largemouth and smallmouth bass, mountain whitefish, large-scale sucker, longfin smelt, prickly sculpin, as well as crayfish, freshwater shrimp, and clams. Washington Department of Fish and Wildlife (WDFW) Priority Habitats and Species (PHS) Program did not identify any priority habitats or species on or within the vicinity of the Site (WDFW 2025c). STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 9 Confidential 3.2 Migration Corridors According to the WDFW PHS Program, there are no mammalian migration corridors within the vicinity of the Site (WDFW, 2025c). Lake Washington contains migration routes for Chinook salmon that pass the Site as adults, returning to the Cedar River; and as juveniles entering the Puget Sound, who may rear near the site. Sockeye juveniles also rear in Lake Washington and may utilize the shoreline and offshore habitat along the site. No other migration or movement corridors are present. 3.3 Vegetative Cover Types and Associated Species Vegetative cover for riparian areas is described in detail above in Section 2.2. Beyond the vegetated shoreline buffer, on-site vegetation consists mainly of various grasses interspersed with small groups of trees and shrubs. The upland trees and shrubs are similar in character to the immediate shoreline vegetation. To the east side of the Site (within the 100’ buffer), red alder (Alnus rubra), black cottonwood, willow, and Himalayan blackberry grow along the banks of a drainage channel parallel to the Lake Washington Trail. Table 1. Habitats and Vegetation Species Present on Site Habitat Cover Type Plant Species Function and Value Deciduous forest Red alder, black cottonwood, Sitka willow, Pacific madrone, vine maple, red maple (Acer rubrum). Wildlife habitat, erosion and sedimentation prevention, water quality protection, temperature regulation, microclimate benefits, bank stability, organic material deposits, aesthetic value Evergreen forest Douglas fir, western red cedar, Sitka spruce, and lodgepole pine (Pinus contorta). Shrubland Himalayan blackberry, salmonberry), chokecherry (Prunus virginiana), willows, snowberry, Nootka rose, vine maple, witch hazel (Hamamelis virginiana), and Oregon grape. Grassland Rye grass (Lolium perenne), soft rush (Juncus effusus), cattail (Typha latifolia), common horsetail, bullrush (Schoenoplectus acutus), buttercup (Ranunculus repens). Riparian Black cottonwood, salmonberry, chokecherry, willows, snowberry, vine maple, arrow bamboo (Pseudosasa japonica), bird’s-foot trefoil (Lotus corniculatus), yellow flag iris (Iris pseudacorus), reed canary grass. Developed/Ornamental Vegetation red-osier dogwood (Cornus stolonifera), Pacific madrone, katsura tree, vine maple, silver maple (Acer saccharinum), arrow bamboo, leyland cypress (Cuprocyparis leylandii), Nootka rose, flowering quince (Chaenomeles japonica), Oregon grape, STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 10 Confidential black mondo grass, Chinese silver grass (Miscanthus sinensis). 3.4 Disturbed Areas The Site has experienced extensive historical human disturbance from prior development and remediation efforts. As described in Section 2.6, planned construction activities will be limited to the southeast portion of the site, affecting only ornamental plantings such as katsura tree, arrow bamboo, black cottonwood, Pacific madrone, western red cedar, Nootka rose, and sword fern. No clearing or construction will occur within 100 feet of the shoreline, and given the Site’s shallow grade, erosion risk is minimal. Additionally, no waste materials will be discharged into surface waters. Waste materials will be removed and disposed of off-site 3.5 Existing Habitat Functions and Values Overall, the upland and aquatic habitat value of the Site is low due to its history of industrial use, the result of which is limited vegetation and capped contamination. The shoreline offers the highest ecological value within the Site and provides the following ecological functions: • Minor amounts of low-diversity organic matter • Nesting and foraging habitat for birds and small mammals • Foraging habitat for larger mammals including deer, coyote, and bobcat (See Section 2.4.1) • Limited capacity to shade or cool the lake • Some erosion control and bank stabilization from fluctuating lake levels and boat wake The upland area on the east side of the Site, as described in Section 3.3 (Figure 4), includes red alder, black cottonwood, and willow. The ecological functions of the upland area are as follows: • Nesting and foraging habitat for birds and small mammals • Foraging habitat for larger mammals including deer, coyote, and bobcat (See Section 2.4.1) • Moderate shading • Some contribution of organic material to the unnamed stream • Limited water quality, bank stabilization, and coarse woody debris input 3.6 Proposed Habitat Alterations Limited alterations to habitat are proposed as a result of this project. The project work will occur within the built environment. Only ornamental vegetation will be affected. The project will not involve any in-water components or work below the OHWM. The habitat and ecological functions that currently exist at the Site are expected to remain post-construction. The project will not impact state STREAM OR LAKE STUDY AND HABITAT DATA NARRATIVE REPORT 11 Confidential or federally listed fish or wildlife species, nor will it impact any migration corridors. Best management practices will be used to limit or mitigate any temporary disturbance to upland areas during the construction process. 4. REFERENCES • Washington Department of Fish and Wildlife (WDFW). 2025a. Bull trout (Salvelinus confluentus). https://wdfw.wa.gov/species-habitats/species/salvelinus-confluentus#locations • WDFW 2025b. Chinook salmon (Oncorhynchus tshawytscha). https://wdfw.wa.gov/species- habitats/species/oncorhynchus-tshawytscha#locations • WDFW 2025c. Priority Habitat and Species Maps. https://wdfw.wa.gov/species-habitats/at- risk/phs. • eBird. 2025. Barbee Mill Spit Bird List. https://ebird.org/hotspot/L20831153/bird- list?hs_sortBy=date&hs_o=asc • Wiles, G. J., and K. S. Kalasz. 2017. Status report for the Yellow-billed Cuckoo in Washington. Washington Department of Fish and Wildlife, Olympia, Washington. 32+ iv pp. https://wdfw.wa.gov/publications/01881 Confidential FIGURES ( Site Access (Main) Site Access (Secondary) PR O J E C T : 1 9 4 0 1 1 6 5 0 8 | D A T E D : 1 1 / 1 1 / 2 0 2 5 | D E S I G N E R : C P A U L G O R S L I N E C: \ U s e r s \ c p a u l g o r s l i n e \ R a m b o l l \ E c o l o g i c a l S e r v i c e s - G I S - G I S \ P r o j e c t s \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 . a p r x \ P r o j e c t L o c a t i o n Service Layer Credits: Bing Maps Aerial: © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS 0 200100 Feet RAMBOLL AMERICAS ENGINEERING SOLUTIONS, INC. A RAMBOLL COMPANY FIGURE 01 Virginia Mason Athletic Center 12 Seahawks Way Renton, WA Parcel Boundary Approximate Project Area 100' Parcel Buffer SITE MAP VIRGINIA MASON ATHLETIC CENTER EXPANSION !á(N ( Un n a m e d S t r e a m ( T y p e F ) PR O J E C T : 1 9 4 0 1 1 6 5 0 8 | D A T E D : 1 1 / 1 1 / 2 0 2 5 | D E S I G N E R : C P A U L G O R S L I N E C: \ U s e r s \ c p a u l g o r s l i n e \ R a m b o l l \ E c o l o g i c a l S e r v i c e s - G I S - G I S \ P r o j e c t s \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 . a p r x \ W a t e r s a n d S h o r e l i n e Service Layer Credits: Bing Maps Aerial: © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS 0 200100 Feet RAMBOLL AMERICAS ENGINEERING SOLUTIONS, INC. A RAMBOLL COMPANY FIGURE 02 Virginia Mason Athletic Center 12 Seahawks Way Renton, WA Parcel Boundary Approximate Project Area 100' Parcel Buffer Regulated Shoreline Streams Approximate OHWM Approximate Site Drainage WATERS AND SHORELINE JURISDICTION VIRGINIA MASON ATHLETIC CENTER EXPANSION !á(N Lake Washington (Type S) ( 30 40 20 30 22 44 24 42 38 34 2 6 36 34 18 32 2 2 28 24 26 PR O J E C T : 1 9 4 0 1 1 6 5 0 8 | D A T E D : 1 1 / 1 1 / 2 0 2 5 | D E S I G N E R : C P A U L G O R S L I N E C: \ U s e r s \ c p a u l g o r s l i n e \ R a m b o l l \ E c o l o g i c a l S e r v i c e s - G I S - G I S \ P r o j e c t s \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 . a p r x \ T o p o Service Layer Credits: Bing Maps Aerial: © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS 0 200100 Feet RAMBOLL AMERICAS ENGINEERING SOLUTIONS, INC. A RAMBOLL COMPANY FIGURE 03 Virginia Mason Athletic Center 12 Seahawks Way Renton, WA Parcel Boundary Approximate Project Area 100' Parcel Buffer 2' Contour Primary 2' Contour Intermediate SITE TOPOGRAPHY VIRGINIA MASON ATHLETIC CENTER EXPANSION !á(N ( PR O J E C T : 1 9 4 0 1 1 6 5 0 8 | D A T E D : 1 1 / 2 4 / 2 0 2 5 | D E S I G N E R : C P A U L G O R S L I N E C: \ U s e r s \ c p a u l g o r s l i n e \ R a m b o l l \ E c o l o g i c a l S e r v i c e s - G I S - G I S \ P r o j e c t s \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 \ S e a h a w k s _ V M A C _ 2 0 2 5 0 9 2 4 . a p r x \ V e g e t a t i o n Service Layer Credits: Bing Maps Aerial: © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS 0 200100 Feet RAMBOLL AMERICAS ENGINEERING SOLUTIONS, INC. A RAMBOLL COMPANY FIGURE 04 Virginia Mason Athletic Center 12 Seahawks Way Renton, WA Parcel Boundary Approximate Project Area 100' Parcel Buffer Habitat Type Deciduous Forest Evergreen Forest Shrubland Grassland Riparian Area Developed/Ornamental Vegetation VEGETATION TYPES ON SITE VIRGINIA MASON ATHLETIC CENTER EXPANSION !á(N Confidential APPENDIX A IPAC SPECIES LIST FROM WASHINGTON FISH AND WILDLIFE OFFICE 10/17/2025 20:22:17 UTC United States Department of the Interior FISH AND WILDLIFE SERVICE Washington Fish And Wildlife Office 1009 College St Se Ste 215 Lacey, WA 98503-1249 Phone: (360) 753-9440 Fax: (360) 753-9405 https://www.fws.gov/office/washington-fish-and-wildlife In Reply Refer To: Project Code: 2026-0006201 Project Name: VMAC Subject:List of threatened and endangered species that may occur in your proposed project location or may be affected by your proposed project To Whom It May Concern: The enclosed species list identifies threatened, endangered, proposed and candidate species, as well as proposed and final designated critical habitat, that may occur within the boundary of your proposed project and/or may be affected by your proposed project. The species list fulfills the requirements of the U.S. Fish and Wildlife Service (Service) under section 7(c) of the Endangered Species Act (Act) of 1973, as amended (16 U.S.C. 1531 et seq.). New information based on updated surveys, changes in the abundance and distribution of species, changed habitat conditions, or other factors could change this list. Please feel free to contact us if you need more current information or assistance regarding the potential impacts to federally proposed, listed, and candidate species and federally designated and proposed critical habitat. Please note that under 50 CFR 402.12(e) of the regulations implementing section 7 of the Act, the accuracy of this species list should be verified after 90 days. This verification can be completed formally or informally as desired. The Service recommends that verification be completed by visiting the IPaC website at regular intervals during project planning and implementation for updates to species lists and information. An updated list may be requested through the IPaC system by completing the same process used to receive the enclosed list. The purpose of the Act is to provide a means whereby threatened and endangered species and the ecosystems upon which they depend may be conserved. Under sections 7(a)(1) and 7(a)(2) of the Act and its implementing regulations (50 CFR 402 et seq.), Federal agencies are required to utilize their authorities to carry out programs for the conservation of threatened and endangered species and to determine whether projects may affect threatened and endangered species and/or designated critical habitat. A Biological Assessment is required for construction projects (or other undertakings having similar physical impacts) that are major Federal actions significantly affecting the quality of the Project code: 2026-0006201 10/17/2025 20:22:17 UTC   2 of 8 human environment as defined in the National Environmental Policy Act (42 U.S.C. 4332(2) (c)). For projects other than major construction activities, the Service suggests that a biological evaluation similar to a Biological Assessment be prepared to determine whether the project may affect listed or proposed species and/or designated or proposed critical habitat. Recommended contents of a Biological Assessment are described at 50 CFR 402.12. If a Federal agency determines, based on the Biological Assessment or biological evaluation, that listed species and/or designated critical habitat may be affected by the proposed project, the agency is required to consult with the Service pursuant to 50 CFR 402. In addition, the Service recommends that candidate species, proposed species and proposed critical habitat be addressed within the consultation. More information on the regulations and procedures for section 7 consultation, including the role of permit or license applicants, can be found in the "Endangered Species Consultation Handbook" at: https://www.fws.gov/sites/default/files/documents/endangered-species-consultation- handbook.pdf Migratory Birds: In addition to responsibilities to protect threatened and endangered species under the Endangered Species Act (ESA), there are additional responsibilities under the Migratory Bird Treaty Act (MBTA) and the Bald and Golden Eagle Protection Act (BGEPA) to protect native birds from project-related impacts. Any activity resulting in take of migratory birds, including eagles, is prohibited unless otherwise permitted by the U.S. Fish and Wildlife Service (50 C.F.R. Sec. 10.12 and 16 U.S.C. Sec. 668(a)). For more information regarding these Acts, see https://www.fws.gov/program/migratory-bird-permit/what-we-do. It is the responsibility of the project proponent to comply with these Acts by identifying potential impacts to migratory birds and eagles within applicable NEPA documents (when there is a federal nexus) or a Bird/Eagle Conservation Plan (when there is no federal nexus). Proponents should implement conservation measures to avoid or minimize the production of project-related stressors or minimize the exposure of birds and their resources to the project-related stressors. For more information on avian stressors and recommended conservation measures, see https:// www.fws.gov/library/collections/threats-birds. In addition to MBTA and BGEPA, Executive Order 13186: Responsibilities of Federal Agencies to Protect Migratory Birds, obligates all Federal agencies that engage in or authorize activities that might affect migratory birds, to minimize those effects and encourage conservation measures that will improve bird populations. Executive Order 13186 provides for the protection of both migratory birds and migratory bird habitat. For information regarding the implementation of Executive Order 13186, please visit https://www.fws.gov/partner/council-conservation- migratory-birds. We appreciate your concern for threatened and endangered species. The Service encourages Federal agencies to include conservation of threatened and endangered species into their project planning to further the purposes of the Act. Please include the Consultation Code in the header of this letter with any request for consultation or correspondence about your project that you submit to our office. Project code: 2026-0006201 10/17/2025 20:22:17 UTC   3 of 8 ▪ Attachment(s): Official Species List OFFICIAL SPECIES LIST This list is provided pursuant to Section 7 of the Endangered Species Act, and fulfills the requirement for Federal agencies to "request of the Secretary of the Interior information whether any species which is listed or proposed to be listed may be present in the area of a proposed action". This species list is provided by: Washington Fish And Wildlife Office 1009 College St Se Ste 215 Lacey, WA 98503-1249 (360) 753-9440 Project code: 2026-0006201 10/17/2025 20:22:17 UTC   4 of 8 PROJECT SUMMARY Project Code:2026-0006201 Project Name:VMAC Project Type:Commercial Development Project Description:Addition to existing building Project Location: The approximate location of the project can be viewed in Google Maps: https:// www.google.com/maps/@47.535868949999994,-122.19881309367881,14z Counties:King County, Washington Project code: 2026-0006201 10/17/2025 20:22:17 UTC   5 of 8 1. ENDANGERED SPECIES ACT SPECIES There is a total of 6 threatened, endangered, or candidate species on this species list. Species on this list should be considered in an effects analysis for your project and could include species that exist in another geographic area. For example, certain fish may appear on the species list because a project could affect downstream species. IPaC does not display listed species or critical habitats under the sole jurisdiction of NOAA Fisheries , as USFWS does not have the authority to speak on behalf of NOAA and the Department of Commerce. See the "Critical habitats" section below for those critical habitats that lie wholly or partially within your project area under this office's jurisdiction. Please contact the designated FWS office if you have questions. NOAA Fisheries, also known as the National Marine Fisheries Service (NMFS), is an office of the National Oceanic and Atmospheric Administration within the Department of Commerce. 1 Project code: 2026-0006201 10/17/2025 20:22:17 UTC   6 of 8 BIRDS NAME STATUS Marbled Murrelet Brachyramphus marmoratus Population: U.S.A. (CA, OR, WA) There is final critical habitat for this species. Your location does not overlap the critical habitat. Species profile: https://ecos.fws.gov/ecp/species/4467 General project design guidelines: https://ipac.ecosphere.fws.gov/project/G3NLHAEAE5HZDFFFHEO3MO4GHU/ documents/generated/10153.pdf Threatened Yellow-billed Cuckoo Coccyzus americanus Population: Western U.S. DPS There is final critical habitat for this species. Your location does not overlap the critical habitat. Species profile: https://ecos.fws.gov/ecp/species/3911 Threatened REPTILES NAME STATUS Northwestern Pond Turtle Actinemys marmorata No critical habitat has been designated for this species. Species profile: https://ecos.fws.gov/ecp/species/1111 Proposed Threatened FISHES NAME STATUS Bull Trout Salvelinus confluentus Population: U.S.A., coterminous, lower 48 states There is final critical habitat for this species. Your location overlaps the critical habitat. Species profile: https://ecos.fws.gov/ecp/species/8212 General project design guidelines: https://ipac.ecosphere.fws.gov/project/G3NLHAEAE5HZDFFFHEO3MO4GHU/ documents/generated/10149.pdf Threatened INSECTS NAME STATUS Monarch Butterfly Danaus plexippus There is proposed critical habitat for this species. Your location does not overlap the critical habitat. Species profile: https://ecos.fws.gov/ecp/species/9743 Proposed Threatened Suckley's Cuckoo Bumble Bee Bombus suckleyi Population: No critical habitat has been designated for this species. Species profile: https://ecos.fws.gov/ecp/species/10885 Proposed Endangered Project code: 2026-0006201 10/17/2025 20:22:17 UTC   7 of 8 CRITICAL HABITATS There is 1 critical habitat wholly or partially within your project area under this office's jurisdiction. NAME STATUS Bull Trout Salvelinus confluentus https://ecos.fws.gov/ecp/species/8212#crithab Final Project code: 2026-0006201 10/17/2025 20:22:17 UTC   8 of 8 IPAC USER CONTACT INFORMATION Agency:Private Entity Name:Carrie Paul-Gorsline Address:901 5th Ave Address Line 2:Suite 3900 City:Seattle State:WA Zip:98164 Email cpaulgorsline@ramboll.com Phone:2063361685 Confidential APPENDIX B CITY OF RENTON CORRESPONDENCE CAUTION: This email originated from outside the City of Renton. Do not click links, reply or open attachments unless you know the content is safe. From:Jill Ding To:Alison Anastasio Cc:Tom Chiado; Ingrid Krueger; Lis Nelis; Carrie Paul-Gorsline; Fonfara, Peter Subject:RE: Clarifying question for environmental review - 12 Seahawks Way Date:Thursday, November 6, 2025 1:49:54 PM Attachments:image002.png image003.png image004.png Some people who received this message don't often get email from jding@rentonwa.gov. Learn why this isimportant Alison, See my responses below. JILL DING, Senior Planner City of Renton // Planning Virtual Permit Center // Online Applications and Inspections office 425-430-6598 NOTICE OF PUBLIC DISCLOSURE: This message complies with Washington State’s Public Records Act – RCW 42.56 From: Alison Anastasio <AANASTASIO@ramboll.com> Sent: Thursday, November 6, 2025 9:10 AM To: Jill Ding <JDing@Rentonwa.gov> Cc: Tom Chiado <tom@chiadollc.com>; Ingrid Krueger <ingrid.krueger@hok.com>; Lis Nelis <lnelis@ramboll.com>; Carrie Paul-Gorsline <CPAULGORSLINE@ramboll.com>; Fonfara, Peter <peterf@seahawks.com> Subject: Re: Clarifying question for environmental review - 12 Seahawks Way Good morning, Jill, I'm following up with a few more questions about the non-SEPA-checklist parts of the application. Of course I would be happy to give you a call to discuss if that would be easier than responding via email! Thank you for your assistance, Alison Stream or Lake Study 1. Shoreline Substantial Development Permit (SSDP) regulations state a scale of 1" = 20' for maps unless exempted for the Stream or Lake study. Due to the size of the site, can we use a scale of 1" = 200' for readability, and to include the entire parcel on a single map? Yes, that is fine 2. The Stream or Lake study as well as the habitat plan require "typical cross-section views." Since the proposed work is not anticipated to impact the stream, lake, or critical habitat, are these required figures? If so, could you please share more detailed specifications, such as the number of cross-sections and their location? We are unsure what is meant by a "typical" cross-section. As no impacts are proposed, this is not required. 3. The SSDP regulations (in Stream or Lake narrative) also state "In addition, if the project involved an unclassified stream, a supplemental stream or lake study is also required". There is an unclassified stream on site but it is encased in concrete ("Gypsy Subbasin") and will not be impacted by the project. Is a supplemental study, in addition to the Stream or Lake narrative, required? Not, this is not required, unless impacts are proposed. Biological assessment/Critical areas study 4. SSDP p 22 "Projects with the potential to impact fish (Chinook salmon, bull trout, steelhead trout), unexpected, new, rare or other endangered species habitat (bald eagles) shall provide a biological assessment/critical area study." Although these species are in the vicinity of the parcel/site, is this study required, given these species/habitats will not be impacted by the new construction? No, just make sure you make it clear in your application that these species would not be impacted by the proposed development. 5. RMC 4-3-050G development standards for the map, require a 115' buffer for Type F streams. Is that buffer still required if the stream is encased? Stream buffer are not applicable to piped streams. 6. If this study is required, one type of critical area on site is "regulated slopes" - however, on the COR map of the parcel, the regulated slopes provided seem to be out of date, and were not observed during the site visit (see 1st image). There is however a constructed berm to the east of the practice field (2nd image). Is this a regulated slope? Further, the slope of the current shoreline is not as steep per the site visit as it looks on the COR map. How should we proceed in assessing regulated slopes, given the COR map? You can submit your own topographic map that shows these areas are not steep slopes. a. Habitat assessment 7. This report also requires "Top view and typical cross-section views of critical habitat/wildlife habitat to scale." Since the proposed work is not anticipated to impact the stream, lake, or critical habitat, are these required figures? If so, could you please share more detailed specifications, such as the number of cross-sections and their location? We are unsure what is meant by a "typical" cross-section. Not require, unless impacts are proposed. Just clarify that the development would not have any impacts in your application materials. Alison Anastasio PhD Managing Consultant, Biodiversity and Ecology D +1 312-288-3820 M +1 708-943-8853 aanastasio@ramboll.com _________________________________ Ramboll 333 W. Wacker Drive Suite 1050 Chicago, IL 60606 USA https://ramboll.com Classification: Confidential From: Alison Anastasio <AANASTASIO@ramboll.com> Sent: Tuesday, September 30, 2025 10:02 AM To: Jill Ding <JDing@Rentonwa.gov> Cc: Tom Chiado <tom@chiadollc.com>; Ingrid Krueger <ingrid.krueger@hok.com>; Lis Nelis <lnelis@ramboll.com>; Carrie Paul-Gorsline <CPAULGORSLINE@ramboll.com> Subject: Re: Clarifying question for environmental review Hi Jill, Thank you for your quick response and clarification. This is very helpful! Best, Alison Alison Anastasio PhD Managing Consultant, Biodiversity and Ecology 1946169 - HS Site Risk Assessment & Community Health US D +1 3122883820 M +1 708-943-8853 aanastasio@ramboll.com _________________________________ Ramboll 333 W. Wacker Drive Suite 1050 Chicago, IL 60606 USA https://ramboll.com From: Jill Ding <JDing@Rentonwa.gov> Sent: Tuesday, September 30, 2025 9:53 AM To: Alison Anastasio <AANASTASIO@ramboll.com> Cc: Tom Chiado <tom@chiadollc.com>; Ingrid Krueger <ingrid.krueger@hok.com>; Lis Nelis <lnelis@ramboll.com>; Carrie Paul-Gorsline <CPAULGORSLINE@ramboll.com> Subject: RE: Clarifying question for environmental review You do not need to identify all trees on the project site, only those trees within the vicinity of the proposed work. Thanks, CAUTION: This email originated from outside the City of Renton. Do not click links, reply or open attachments unless you know the content is safe. JILL DING, Senior Planner City of Renton // Planning Virtual Permit Center // Online Applications and Inspections office 425-430-6598 NOTICE OF PUBLIC DISCLOSURE: This message complies with Washington State’s Public Records Act – RCW 42.56 From: Alison Anastasio <AANASTASIO@ramboll.com> Sent: Monday, September 29, 2025 4:12 PM To: Jill Ding <JDing@Rentonwa.gov> Cc: Tom Chiado <tom@chiadollc.com>; Ingrid Krueger <ingrid.krueger@hok.com>; Lis Nelis <lnelis@ramboll.com>; Carrie Paul-Gorsline <CPAULGORSLINE@ramboll.com> Subject: Clarifying question for environmental review Good afternoon, Jill, I work for Ramboll, supporting the environmental review for the Seattle Seahawks' application for 12 Seahawks Way in Renton. I was informed by the Renton Planning office that you're overseeing this application; please redirect me, if this is incorrect. I have a quick clarification regarding the site map, for section 20a, the Standard Stream or Lake Study: The guidance says a site map is required, showing "vegetative cover ...[including] position, species, and size of all trees at least six inches (6") caliper and larger..." There are several trees of 6" caliper and larger on the site, but only a few are planned for removal, all over 400' from the shoreline. Our question: Do we need to report the position, species, and size of all trees, or focus only on those that will be affected by construction? Happy to discuss further as necessary. Thank you for your assistance. Best, Alison Alison Anastasio PhD Managing Consultant, Biodiversity and Ecology 1946169 - HS Site Risk Assessment & Community Health US D +1 3122883820 M +1 708-943-8853 aanastasio@ramboll.com _________________________________ Ramboll 333 W. Wacker Drive Suite 1050 Chicago, IL 60606 USA https://ramboll.com Classification: Confidential Classification: Confidential Confidential APPENDIX C PHOTOGRAPHIC LOG Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 1: A representative photo of the Lake Washington Shoreline, facing north. Photo 2: A representative photo of the Lake Washington Shoreline and riparian area, facing north. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 3: A second representative photo of the Lake Washington Shoreline and riparian area, facing south. Photo 4: A third representative photo of the Lake Washington Shoreline and riparian area, facing south. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 5: A representative photo of the 60” wide culvert from the piped unnamed stream, facing southeast. Photo 6: A representative photo of the 60” wide culvert from the piped unnamed stream, facing east. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 7: A representative photo of a 12” wide stormwater drainage, facing east. Photo 8: A second representative photo of a 12” wide stormwater drainage, facing east. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 9: A representative photo of evergreen forest on the southwestern portion of the Site, facing east. Photo 10: A second representative photo of evergreen forest on the southwestern portion of the Site, facing east. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 11: A representative photo of developed/ornamental vegetation in project area, facing south. Photo 12: A second representative photo of developed/ornamental vegetation in project area, facing southeast. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 13: A third representative photo of developed/ornamental vegetation in project area, facing south. Photo 14: A fourth representative photo of developed/ornamental vegetation in project area, facing west. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 15: A representative photo of deciduous forest east of the site, but within 100’ site buffer, facing east. Photo 16: A second representative photo of deciduous forest east of the site, but within 100’ site buffer, facing west. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 17: A representative photo of shrubland on site, facing east. Photo 18: A second representative photo of shrubland on site, facing west. Photographic Log Virginia Mason Athletic Center Expansion Renton, WA September 2025 Photo 19: A representative photo of grassland on site, facing north.