HomeMy WebLinkAboutEx08_Stream_Study
Prepared for:
DOWL
8410 154th Avenue NE, Suite 120, Redmond WA 98052 March 31, 2020
Standard Stream Study Narrative
Apron A Stormwater Improvement Project Renton, Washington
The Boeing Company
Wood Project #PS20203650
RECEIVED
04/16/2020
amorganroth
PLANNING DIVISION
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‘Wood’ is a trading name for John Wood Group PLC and its subsidiaries
Wood Environment & Infrastructure Solutions, Inc. 3500 188th Street SW, Suite 601 Lynnwood, WA 98037 USA T: 206-342-1760 www.woodplc.com
March 31, 2020
Travis Neu, PE Project Manager
DOWL
8410 154th Avenue NE, Suite 120
Redmond, WA 98052
Subject: Standard Stream Study Narrative
Apron A Stormwater Improvement Project Renton, Washington
Dear Mr. Neu,
Wood Environment & Infrastructure Solutions, Inc., is pleased to provide the enclosed report of our
results for the Stream Study performed in support of the Apron A Stormwater Improvement Project at the
Boeing-Renton facility.
Sincerely,
Wood Environment & Infrastructure Solutions, Inc.
Jon Chalfant, PLA, ASLA
Landscape Architect
Theresa Price
Environmental Planner/Botanist jon.chalfant@woodplc.com theresa.price@woodplc.com
JC/TP:ke
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Enclosure: Standard Stream Study Narrative
Exhibit 8
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Table of contents
1.0 Introduction ........................................................................................................................................................................... 1
2.0 Project Description .............................................................................................................................................................. 1 2.1 Apron A Stalls A3-A7 ......................................................................................................................................... 1
2.2 Parking Lot W1 ..................................................................................................................................................... 1
3.0 Renton Municipal Code 4-8-120C ................................................................................................................................ 1 4.0 Standard Stream Study Narrative .................................................................................................................................. 3
4.1 Stream Classification .......................................................................................................................................... 3 4.2 Vegetative Cover ................................................................................................................................................. 3
4.3 Ecological Function ............................................................................................................................................ 4 4.4 Fish and Wildlife .................................................................................................................................................. 4
4.4.1 Mammals ............................................................................................................................................... 4 4.4.2 Birds ......................................................................................................................................................... 5
4.4.3 Amphibians and Reptiles ................................................................................................................. 5
4.4.4 Fish ........................................................................................................................................................... 6 4.5 Measures to Protect Trees and Vegetation .............................................................................................. 7
4.6 No Net Loss of Ecological Function ............................................................................................................. 7 5.0 References .............................................................................................................................................................................. 7
List of tables
Table 1 Small Mammals Reported to Occur along the Lower Cedar River Table 2 Birds Reported to Occur along the Lower Cedar River
Table 3 Non-native Fish Species Introduced into the Lake Washington/Lake Union System
List of figures
Figure 1 Vicinity and Site Maps
Figure 2 Aerial Photo of Project Locations
Figure 3 Apron A Site Stormwater Improvements, Plan View—North
Figure 4 Apron A Site Stormwater Improvements, Plan View—Central
Figure 5 Apron A Site Stormwater Improvements, Plan View—South
Figure 6 Parking Lot W1 Site Stormwater Improvements, Plan View
List of appendices
Appendix A Apron A and Parking Lot W1 Photo Log
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1.0 Introduction
The Boeing Company (Boeing) proposes site improvements to the stormwater management facilities at two locations adjacent to Apron A at the Boeing Renton plant in Renton, Washington. As part of permit
applications for facility improvements adjacent to shorelines, the Renton Municipal Code (RMC) requires a
stream narrative report to document existing conditions and describe measures to be taken to protect shoreline resources. This Standard Stream Study Narrative report has been prepared to meet
requirements of the RMC.
2.0 Project Description
This project includes two phases: Apron A Stalls A3-A7 and the W1 Parking Lot (Figures 1 and 2).
2.1 Apron A Stalls A3-A7
The proposed Apron A site improvements include a stormwater conveyance system as well as water quality and fuel spill containment systems to capture and treat the runoff from the eastern quarter of
stalls A3-A7. Locations of proposed site improvements for the Apron A project phase are depicted on
Figures 3–5. The proposed improvements include installation of:
• approximately 810 linear feet (LF) of slot drain,
• catch basins,
• high-density polyethylene (HDPE) storm drainage pipe,
• an oil–water separator,
• enhanced water quality treatment,
• connection to the existing A7 stall drainage, and
• replacement and upgrades to the existing fuel spill valves and controls within stall A7.
2.2 Parking Lot W1
The proposed Parking Lot W1 site improvements include stormwater conveyance and water quality
systems to capture the runoff from the W1 parking lot. The proposed improvements include the
installation of approximately six separate modular wetland water quality units along with a conveyance
system for the treated water and connection to the existing W1 parking lot outfall. Locations of proposed
site improvements for the Parking Lot W1 project phase are depicted on Figure 6.
3.0 Renton Municipal Code 4-8-120C
Under the Renton Municipal Code (RMC) 4-8-120C (Submittal Requirements—Specific to Application Type: Land Use Applications), the City requires the following environmental reports to be included with
Boeing’s permit application submittal for the proposed project:
Stream or Lake Study, Standard: The mitigation plan must ensure compensation for impacts that
result from the chosen development alternative or from a violation as identified in the impact evaluation. A mitigation plan must include:
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 Administrator):
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i. 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);
ii. The OHWM determined in the field by a qualified consultant pursuant to RMC 4-3-050G7
(the OHWM must also be flagged in the field);
iii. Stream or lake classification, as recorded in the City of Renton Water Class Map as
identified in the City of Renton’s COR Maps, the City’s online interactive mapping application available through the City’s website, or RMC 4-3-090 (if unclassified, see “Supplemental
Stream or Lake Study”);
iv. 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 (5') where slopes are ten percent (10%) or greater;
v. 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);
vi. Site drainage patterns, using arrows to indicate the direction of major drainage flow;
vii. Top view and typical cross-section views of the stream or lake bed, banks, and buffers to
scale;
viii. 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 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 any measures to protect trees on and abutting the site;
ix. 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
x. Location of site access, ingress and egress; and
xi. Location of where all mitigation or remediation measures have taken place on the site, or are proposed to take place.
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 (5')
where slopes are ten percent (10%) or greater.
c. Stream or Lake Assessment Narrative: A narrative report on eight and one-half inch (8.5") by
eleven inch (11") paper shall be prepared to accompany the site plan and describes:
i. 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;
ii. 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;
iii. The ecological functions currently provided by the stream/lake and existing riparian area
and the impacts of the proposal on the identified ecological functions;
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iv. 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;
v. Measures to protect trees, as defined per RMC 4-11-200, and vegetation; and
vi. For shorelines regulated under RMC 4-3-090, Shoreline Master Program, 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. (Ord. 5137, 4-25-2005; Ord. 5633, 10-24-2011;
Ord. 5676, 12-3-2012; Ord. 5757, 6-1-2015).
This report fulfills requirement c. above to provide a Stream Assessment Narrative.
4.0 Standard Stream Study Narrative
This section presents the standard stream study narrative, providing information about existing habitat
conditions and functions of the lower Cedar River (LCR) adjacent to the proposed project site. The project
site is defined as those areas of proposed stormwater improvements within the 200-foot shoreline zone
adjacent to the LCR.
4.1 Stream Classification
According to RMC 4-3-050Q4 (City of Renton Water Class Map), the LCR in the vicinity of the project site is a type S water. Type S: Waters are inventoried as “Shorelines of the State” under the Revised Code of
Washington (RCW), Chapter 90.58. These waters are regulated under Renton’s Shoreline Master Program
Regulations, RMC 4-3-090.
4.2 Vegetative Cover
Wood Environment & Infrastructure Solutions, Inc. (Wood), biologist, Theresa Price, conducted a site survey on March 19, 2020, to assess vegetative cover along the LCR shoreline adjacent to and within
100 feet upstream and downstream of the proposed project site. Appendix A provides a photographic log
depicting habitat conditions and vegetation along the riparian zone of the west bank of the LCR adjacent to the project site. Figure A-1 in the photo log provides an aerial image showing the locations where the
photos were taken. Both project sites are on the west shoreline of the LCR and the Renton Municipal
Airport and consist primarily of concrete and asphalt surfaces. Limited landscape plantings are located
between the paved roadway (East Perimeter Road) and Boeing parking lot W1 (Appendix A, Photos 6
and 8).
The riparian zone along the west bank of the LCR adjacent to and within 100 feet upstream and
downstream of the two Boeing project sites comprises a relatively narrow (approximately 20 feet wide or
less) vegetated band consisting of limited trees and shrubs, and grass/herbaceous groundcover. An 8-foot-high concrete flood-control wall abuts the riverbank and confines the width of the riparian zone in
this area along the river (Appendix A, Photos 4, 5, and 7). The paved East Perimeter Road abuts the west side of this flood-control wall.
Vegetation within the riparian zone consists primarily of unidentified herbaceous weedy groundcover and grasses (Appendix A, Photos 1-4, 9-12). Several small clusters of small trees (all of which are less than 4 inches diameter at breast height [DBH]) and shrubs were observed along the west bank of the LCR
within the project site (Appendix A, Photos 1-4, 9-12). A small cluster of alder trees was observed on the
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west bank of the LCR approximately 85 feet south of the Parking Lot W1 project site, on the east side of the concrete flood-control wall (Appendix A, Photo 9). No trees with trunks greater than or equal to
6 inches DBH are located within 100 feet of the project site on the west bank of the LCR. No trees are
located west of the concrete flood-control wall.
4.3 Ecological Function
Riparian habitats have important ecological functions other than providing habitat for birds and other
wildlife. Healthy riparian vegetation protects banks from erosion, influences in-channel aquatic habitats,
maintains favorable water temperature for fish through shading, filters runoff, and provides nutrients.
Riparian vegetation creates meanders, increases habitat complexity, and can protect against scour during
severe storm events. Riparian habitats link upland and aquatic habitats. Upland habitats have a critical role
in watershed function and affect riparian and aquatic habitats, particularly in drier, low-elevation sites.
The riparian zone along the west bank of the LCR adjacent to and within 100 feet upstream and
downstream of the two Boeing project sites comprises a relatively narrow vegetated band consisting of
limited trees and shrubs, and grass/herbaceous groundcover. The west bank of the LCR in this area is
separated from the project sites by an 8-foot-tall concrete flood-control wall.
The primary ecological functions provided by riparian vegetation along the east and west banks of the
LCR within 100 feet upstream and downstream of the project sites include:
• Nesting and foraging habitat for birds and small mammals,
• Input of terrestrial insects from overhanging vegetation,
• Input of allochthonous organic matter (via leaf fall),
• Limited erosion control, and
• Limited habitat complexity.
The LCR is a manmade channel created in 1912 when the river was diverted as a tributary to the former
Black River directly to Lake Washington. The LCR is channelized and substantially altered, so that there is
very limited riparian area to provide all the potential ecological functions of an unaltered habitat. Riparian
vegetation provides very little, if any, shading to the LCR because of the dominance of small shrubs and
the lack of large trees. Both banks of the river in the project areas are contained within levees and/or
flood-control walls, so there is no potential for the creation of meanders or off-channel habitat. Because of extensive development along both banks of the river in the project area (Boeing to the east and west and the Renton Municipal Airport to the west), there is little, if any, transition between riparian and upland
habitats.
4.4 Fish and Wildlife
This section addresses fish and wildlife species that may use the LCR in the vicinity of the project site.
4.4.1 Mammals
No mammals were observed during the site visit. Given the level of development and paved surface area
in the project area, it is likely that only small mammals such as beaver, squirrels, mice, rats, voles, moles,
raccoons, opossums, muskrats, and river otters use the riparian areas along the LCR shoreline adjacent to and within 100 feet upstream and downstream of the project areas. Richter and Azous (1997), conducting
small-mammal surveys in a wetland along the LCR, reported 13 species of mammals (Table 1). These, as
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well as other small mammals common to the Puget lowlands, may occur along the LCR adjacent to the project site.
4.4.2 Birds
Richter and Azous (1997) conducted bird surveys in a wetland of the LCR between late May and mid-June in 1988, 1989, 1991, 1992, and 1995 to determine distribution and relative abundance. They reported
58 species of birds (Table 2). King County also reported bird species observations in 2008 and identified
changes in bird populations and habitat preferences (King County, 2008).
Several bird species were observed during the site visit, including several species not reported by Richter
and Azous (1997). Birds observed during the site visit included American crow (Corvus brachyrhynchos),
American robin (Turdus migratorius), mallard ducks (Anas platyrhynchos), bald eagle (Haliaeetus
leucocephalus), and several unidentified songbird species.
It is likely that all of these birds, as well as other species of birds common to the Puget lowlands, nest or
forage in the project vicinity.
4.4.3 Amphibians and Reptiles
No amphibians or reptiles were observed during the site visits; however, it is likely that amphibian (e.g., Anurans) and reptile species (e.g., turtles) found in the Lake Washington basin may use the areas within
the site vicinity. Richter and Azous (1997) reported the occurrence of the following amphibian species in
the LCR and in King County (2016):
• Ensatina (salamander) (Ensatina eschscholtzii)
• Long-toed salamander (Ambystoma macrodactylus)
• Northwestern salamander (A. gracile)
• Pacific tree frog (Pseudoacris regilla)
• Red-legged frog (Rana aurora)
• Western red-backed salamander (Plethodon vehiculum)
• Bullfrog (Rana catesbeiana)
• Pacific giant salamander (Dicamptodonitdae)
• Roughskin newt (Taricha granulosa)
• Western toad (Anaxyrus boreas)
No information was located listing reptile species occurring along the LCR in the project vicinity; however, reptiles listed for King County (King County, 2016, 2008) that could occur in the project vicinity include:
• Common garter snake (Thamnophis sirtalis)
• Northern alligator lizard (Elgaria coerulea)
• Northwestern garter snake (T. ordinoides)
• Painted turtle (Chrysemys picta)
• Rubber boa (Charina bottae)
• Slider (Trachemys scripta)
• Western fence lizard (Sceloporus occidentalis)
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• Western terrestrial garter snake (T. elegans)
4.4.4 Fish
No fish were observed in the LCR adjacent to the project sites during the site visit. The Lake Washington
system, including the LCR adjacent to the project site, hosts many fish species, including five salmonid
species: Chinook salmon (Oncorhynchus tshawytscha), coho salmon (O. kisutch), sockeye/kokanee salmon
(O. nerka), coastal cutthroat trout (O. clarki clarki), and steelhead/rainbow trout (O. mykiss) (King County,
2008; WDFW, 2020). Anadromous forms of each of these species use the Cedar River system as migratory,
forage, nursery, and spawning habitat. As such, individuals are present in the river both as adults during
migrations to spawning grounds and as juveniles (Kerwin, 2001). All of these species occur seasonally in
the LCR adjacent to the project site. Additionally, there have been isolated reports of coastal/Puget Sound bull trout (Salvelinus confluentus) and kokanee occurring in the Lake Washington system; however, it is
believed that few bull trout occur in the Lake Washington system, if they occur at all. Puget Sound
Chinook salmon, Puget Sound steelhead trout, and bull trout are federally listed species under the Endangered Species Act.
Nonanadromous forms of winter steelhead (rainbow trout), sockeye (kokanee), and cutthroat trout may also occur in the LCR. Resident rainbow trout spend their entire life in the Lake Washington system. The resident rainbow trout population was sustained with hatchery plants because they rarely successfully
reproduce within Water Resource Inventory Area 8; however, releases of hatchery rainbow trout have been all but eliminated. Nonanadromous coastal cutthroat trout also occur in the Lake Washington
system and are much more abundant than the anadromous form. Kokanee salmon is the freshwater, resident form of O. nerka. Some progeny from the parents of anadromous sockeye may also remain in
Lake Washington for all or a portion of their lives (resident/anadromous sockeye) (Kerwin, 2001).
The largest single population of adfluvial bull trout in western Washington is found above Cedar Falls in the upper Cedar River watershed. It is believed that a small number of bull trout pass through the
reservoir and downstream hydroelectric facilities to the river reaches below Cedar Falls. However, it is apparently not sufficient to support the establishment of bull trout populations under the current
ecological conditions (Corps, 2002).
Native char, presumably bull trout, have been observed in the fish ladder viewing pool at the Hiram M.
Chittenden Locks as recently as 1997, while isolated reports of native char being caught in or around Lake Washington occur every few years. A large juvenile char, again, presumably a bull trout (~250 millimeter, 3-year-old), was caught in the LCR in July 1998. An adult char was also caught in the LCR in April 1993
(Corps, 2002).
Based on this information, occurrence of bull trout in the LCR adjacent to the project site is expected to
be extremely limited, if they occur at all.
Fish exclusion surveys conducted by Amec Foster Wheeler (now Wood) biologists in June 2013 and June 2014 as part of Boeing’s North Bridge Replacement project on the LCR identified juvenile Chinook and
coho salmon, as well as juvenile steelhead/rainbow trout. Other fish species identified during these surveys included slimy sculpin (Cottus asper), three-spined stickleback (Gasterosteus aculeatus), and
ammocoetes of an unidentified lamprey species (Petromyzontidae sp.).
Species endemic to the Lake Washington system include the northern pike minnow (Ptychocheilus
oregonensis), peamouth (Mylocheilus caurinus), sculpins (Cottus spp.), and longfin smelt (Spirinchus
thaleichthys) (Weitkamp et al., 2000; Wydoski and Whitney, 2003). Twenty-four non-native fish species (Table 3) have been identified in the Lake Washington/Lake Union system. A number of these species are
now believed to be no longer present in the system. Some of these species are known to prey on juvenile
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salmon (e.g., smallmouth bass) while others are potential competitors with juvenile salmonids for food (Kerwin, 2001).
4.5 Measures to Protect Trees and Vegetation
The proposed projects will be confined to the Boeing property and will not occur in areas with existing trees or riparian vegetation. All work areas will be separated from riparian areas by an 8-foot-tall flood-
control wall. No direct or indirect impacts to riparian vegetation or trees will occur as a result of the
proposed projects; therefore, no measures to protect vegetation or trees have been incorporated into the
work plan.
4.6 No Net Loss of Ecological Function
The project will result in no net loss of ecological function in the riparian zone of the LCR adjacent to and 100 feet upstream and downstream of the project sites. There will be no change in the area of impervious surfaces within the shoreline zone.
5.0 References
Corps – see U.S. Army Corps of Engineers
Kerwin, J. 2001. Salmon and Steelhead Habitat Limiting Factors Report for the Cedar-Sammamish Basin
(Water Resource Inventory Area 8). Washington Conservation Commission, Olympia.
King County. 2008. King County Biodiversity Report 2008. King County, Seattle, Washington.
http://www.kingcounty.gov/environment/animalsAndPlants/biodiversity/king-county-biodiversity-
report.aspx (accessed March 23, 2020).
King County. 2016. Herp Species in King County. King County Biodiversity Report 2008. King County,
Seattle, Washington. https://www.kingcounty.gov/services/environment/animals-and-
plants/biodiversity/defining-biodiversity/species-of-interest/herps.aspx (accessed March 23,
2020).
Richter, K.O., and Azous, A.L. 1997. Amphibian distribution, abundance, and habitat use, in Azous, A.L., and
Horner, R.R. (eds.), Wetlands and Urbanization – Implications for the Future, final report. Puget
Sound Wetlands and Stormwater Management Research Program, Washington State Department of Ecology, Olympia, King County Water and Land Resources Division, Seattle, Washington, and
University of Washington, Seattle. http://your.kingcounty.gov/dnrp/library/archive-
documents/wlr/wetlands-urbanization-report/wet-rept.pdf (accessed September 1, 2009).
U.S. Army Corps of Engineers (Corps). 2002. Montlake Cut Slope Stabilization Project Environmental
Assessment Biological Evaluation – Lake Washington Ship Canal, Seattle, Washington. U.S. Army
Corps of Engineers, Seattle District, Seattle, Washington.
Washington State Department of Fish and Wildlife (WDFW), 2020, SalmonScape. 2017. http://apps.wdfw.wa.gov/salmonscape/map.html (accessed March 23, 2020).
Weitkamp, D.E., Ruggerone, G.T., Sacha, L., Howell, J., and Bachen, B. 2000. Factors Affecting Chinook Populations – Background Report. City of Seattle, Seattle, Washington.
Wydoski, R.S., and Whitney, R.R. 2003. Inland Fishes of Washington. American Fisheries Society, Bethesda,
Maryland, and University of Washington Press, Seattle.
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Tables
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TABLE 1. SMALL MAMMALS REPORTED TO OCCUR ALONG THE LOWER CEDAR RIVER¹ Apron A Stormwater Improvement Project, Renton, Washington
Common name Scientific name (Genus species) Common name Scientific name (Genus species)
Creeping vole Microtus oregoni Montane shrew Sorex monticolus
Deer mouse Peromyscus maniculatus Shrew-mole Neurotrichus gibbsii
Ermine Mustela ermine Southern red-backed vole Clethryonomys gapperi
Forest deer mouse Peromyscus oreas Townsend’s chipmunk Tamias townsendii
Long-tailed vole Microtus longicaudus Trowbridge’s shrew Sorex trowbridgei
Marsh shrew Sorex bendirei Vagrant shrew Sorex vagrans
Masked shrew Sorex cinereus
Note(s) 1.Source: Richter and Azous, 1997.
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Table 2. BIRDS REPORTED TO OCCUR ALONG THE LOWER CEDAR RIVER1 Apron A Stormwater Improvement Project, Renton, Washington
Common name Scientific name (Genus species) Common name Scientific name (Genus species)
American crow Corvus brachyrhynchos Northern pygmy owl Glaucidium gnoma
American goldfinch Carduelis tristis Orange-crowned warbler Vermivora celata
American robin Turdus migratorius Pine siskin Carduelis pinus
Black-capped chickadee Parus atricapillus Pacific-slope flycatcher Empidonax difficilis
Belted kingfisher Ceryle alcyon Purple finch Carpodacus purpureus
Bewick’s wren Thryomanes bewickii Red-breasted nuthatch Sitta Canadensis
Brown-headed cow bird Molothrus ater Red-breasted sapsucker Sphyrapicus ruber
Black-headed grosbeak Pheucticus melanocephalus Red crossbill Loxia curvirostra
Brewer’s blackbird Euphagus cyanocephalus Red-eyed vireo Vireo olivaceus
Brown creeper Certhia Americana Rufous-sided towhee Pipilo erythrophthalmus
Black-throated gray warbler Dendroica nigrescens Ruffed grouse Bonasa umbellus
Bushtit Psaltriparus minimus Ruby-crowned kinglet Regulus calendula
Chestnut-backed chickadee Parus rufescens Red-winged blackbird Agelaius phoeniceus
Cedar waxwing Bombycilla cedrorum Sora Porzana Carolina
Cooper’s hawk Accipiter cooperii Song sparrow Melospiza melodia
Common raven Corvus corax Sharp-shinned hawk Accipiter striatus
Common yellow throat Geothlypis trichas Steller’s jay Cyanocitta stelleri
Dark-eyed junco Junco hyemalis Swainson’s thrush Catharus ustulatus
Downy woodpecker Picoides pubescens Townsend’s warbler Setophaga townsendi
European starling Sturnus vulgaris Vaux’s swift Chaetura vauxi
Evening grosbeak Coccothraustes vespertinus Violet-green swallow Tachycineta thalassina
Fox sparrow Passerella iliaca Virginia rail Rallus limicola
Great blue heron Ardea herodias Warbling vireo Vireo gilvus
Golden-crowned kinglet Regulus satrapa Western tanager Piranga ludoviciana
Hairy woodpecker Picoides villosus Willow flycatcher Empidonax traillii
Hermit thrush Catharus guttatus Wilson’s warbler Cardellina pusilla
Marsh wren Cistothorus palustris Winter wren Troglodytes hiemalis
MacGillivray’s warbler Geothlypis tolmiei Wood duck Aix sponsa
Northern flicker Colaptes auratus Yellow warbler Dendroica petechia
Note(s) 1. Source: Richter and Azous, 1997. Table lists only species reported by Richter and Azous (1997). Other species have been observed during
other investigations and during the field visit on March 19, 2020.
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Table 3. NON-NATIVE FISH SPECIES INTRODUCED INTO THE LAKE WASHINGTON/LAKE UNION SYSTEM¹
Apron A Stormwater Improvement Project, Renton, Washington
Common name Scientific name (Genus species) Status
American shad Alosa sapidissima Uncommon strays
Atlantic salmon Salmo salar Can exceed 1,000 per year
Black bullhead Ictalurus melas Extinct
Black crappie Pomoxis nigromaculatus Common
Bluegill Lepomis macrocheilus Common
Brook trout Salvelinus fontinalis Rarely caught
Brown bullhead Ictalurus nebulosus Rare, may be extinct
Brown trout Salmo trutta No observed reproduction
Channel catfish Ictalurus punctatus Rarely caught
Cherry salmon Oncorhynchus masou Extinct
Common carp Cyprinus carpio Abundant
Fathead minnow Pimephales notatus Unknown
Goldfish Carassius auratus Intermittent
Grass carp Ctenopharengodon idella Triploids only
Lake trout Salvelinus namaycush Extinct
Lake whitefish Coregonus clupeaformis Extinct
Largemouth bass Micropterus salmoides Common
Pumpkinseed sunfish Lepomis gibbosus Abundant
Smallmouth bass Micropterus dolomieui Common
Tench Tinca tinca Abundant
Warmouth Lepomis gulosus No observed reproduction
Weather loach Misgurnus angillicaudatus No observed reproduction
White crappie Pomoxis annularis Uncommon
Yellow perch Perca flavescens Abundant
Note(s) 1. Source: Kerwin, 2001.
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Figures
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ApronA_StreamStudyFigures_20200326.xlsxVICINITY AND SITE MAPS
Date: 03/30/2020 Proj. No. PS20203650
Figure 1
Standard Stream Study Narrative
Apron A Stormwater Improvement Project
Renton, WA
By: tlp
Project Location
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ApronA_StreamStudyFigures_20200326.xlsxAERIAL PHOTO OF PROJECT LOCATIONS
(in yellow)
Date: 03/30/2020 Proj. No. PS20203650
Figure 2
Standard Stream Study Narrative
Apron A Stormwater Improvement Project
By: tlp
Parking Lot W1
Apron A Site
Improvements
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ApronA_StreamStudyFigures_20200326.xlsxDate: 03/30/2020By: tlpProj. No. PS20203650Figure 3APRON A SITE STORMWATER IMPROVEMENTS, PLAN VIEW - NORTHStandard Stream Study Narrative Apron A Stormwater Improvement ProjectRenton, WADocuSign Envelope ID: AD7CAF2A-ED12-4A88-ACD2-89EFB0E3A881
ApronA_StreamStudyFigures_20200326.xlsxDate: 03/30/2020By: tlpProj. No. PS20203650Figure 4APRON A SITE STORMWATER IMPROVEMENTS, PLAN VIEW - CENTRALStandard Stream Study Narrative Apron A Stormwater Improvement ProjectRenton, WADocuSign Envelope ID: AD7CAF2A-ED12-4A88-ACD2-89EFB0E3A881
ApronA_StreamStudyFigures_20200326.xlsxDate: 03/30/2020By: tlpProj. No. 20203650Figure 5APRON A SITE STORMWATER IMPROVEMENTS, PLAN VIEW - SOUTHStandard Stream Study Narrative Apron A Stormwater Improvement ProjectRenton, WADocuSign Envelope ID: AD7CAF2A-ED12-4A88-ACD2-89EFB0E3A881
ApronA_StreamStudyFigures_20200326.xlsxDate: 03/30/2020By: tlpProj. No. 20203650Figure 6PARKING LOT W1 SITE STORMWATER IMPROVEMENTS, PLAN VIEWStandard Stream Study Narrative Apron A Stormwater Improvement ProjectRenton, WADocuSign Envelope ID: AD7CAF2A-ED12-4A88-ACD2-89EFB0E3A881
Appendix A
APRON A AND PARKING LOT W1 PHOTO LOG
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ApronA_StreamStudyFigures_20200326.xlsxPHOTO POINTS ADJACENT TO PROJECT SITE
Date: 03/30/2020 Proj. No. 20203650
Figure A-1
Standard Stream Study Narrative
Apron A Stormwater Improvement Project
By: tlp
1, 2
3, 4
5, 6
7, 8
9
10, 11
12
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Appendix A. Apron A and Parking Lot W1 Photo Log
Photo 1 North at Apron D bridge – Oregon grape, young cottonwood, unidentified grasses, weeds
Photo 2 East at Apron D bridge – Cottonwood saplings, red osier dogwood unidentified grasses, and weeds
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Photo 3 East at Apron D bridge – Red osier dogwood, Cottonwood sapling, unidentified grasses, and weeds
Photo 4 South at Apron D bridge – Cottonwood saplings, unidentified grass, and weeds
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Photo 5 South along Perimeter Road – limited lawn grass, concrete floodwall. Alder and poplar trees located on east riverbank, across LCR
Photo 6 Landscaped parking lot planter area (arbor vitae, assorted shrubs) along Perimeter Road
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Photo 7 North along Perimeter Road – limited lawn grass, concrete floodwall. Alder and poplar trees located on east LCR
Photo 8 North along Perimeter Road – Landscaped parking lot planter area (rose, Lonicera)
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Photo 9 West, on east bank LCR – Alder tree (less than 10” DBH) cluster and Scotch broom
Photo 10 Northwest, on east bank LCR – Scotch broom, alder/cottonwood saplings, unidentified grasses and weeds
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Photo 11 Southwest, on east bank LCR – Unidentified grasses and weeds
Photo 12 Southwest, on east bank LCR – Alder/cottonwood saplings, red osier dogwood, tall Oregon grape, unidentified grasses and weeds
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