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REN`YON SUNNY DAL-I"'
DOWNSTREAM STORKI SYSTEM
REPLACEMENT PROJECT
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BIOLOGICAL EVALL)AT" ION
For Coorcfin2tion with
National Ma.wlrie �V lsh,er""?s Ser"Fice and
United States HsV and Wildiffe Service
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A D 0 L F S 0 N
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Prepared for
City of Rent-on
Surface Water UtiNty
1055 South Grady Way.
Plszi�Aon, Washington 98055
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Prepared bV-
Adclfson Assou�ates,
33 Q., Shilshole Avenue NVO
wase`11,nqton, 98-10?,
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' Table of Contents
' 1.0 INTRODUCTION..............................................................................................................................................I
1.1 BACKGROUND INFORMATION...........................................................................................................................1
2.0 STUDY PURPOSE.............................................................................................................................................1
' 3.0 STUDY OBJECTIVES......................................................................................................................................2
4.0 DESCRIPTION OF PROPOSED ACTION AND ACTION AREA.............................................................3
4.1 PRIMARY PROJECT FEATURES,......,...... .3
' 4.1.1 Stormwater Pipe Replacement and Realignment...................................................................................3
4.1.2 Installation of Energy Dissipator...........................................................................................................4
' 4.1.3 Clearing.................................................................................................................................................4
4.1.4 Removal of Existing Corrugated Metal Stormwater Pipe......................................................................4
4.2 SECONDARY PROJECT FEATURES.....................................................................................................................5
' 4.2.1 Timing, Noise, and Detours...................................................................................................................5
4.2.2 Stormwater Pipe Operation and Maintenance..:...................................................................................5
4.3 ACTION AREA AND HABITAT DESCRIPTION.......................................................................................5
' 4.3.1 Environmental Baseline.........................................................................................................................6
4.3.1.1 Terrestrial Environment.....................................................................................................................................6
4.3.1.2 Aquatic Environment.........................................................................................................................................6
' 1.0 STATUS OF THE SPECIES AND CRITICAL HABITAT............ .......*,***,******,*'*....7
5.1 THREATENED SPECIES......................................................................................................................................7
5.1.1 Coastal/Puget Sound Bull Trout............................................................................................................7
5.1.1.1 Life History........................................................................................................................................................7
' 5.1.1.2 Critical Habitat...................................................................................................................................................7
5.1.1.3 Environmental Baseline.....................................................................................................................................7
5.1.2 Puget Sound ESU Chinook Salmon.......................................................................................................8
t 5.1.2.1 Life History........................................................................................................................................................8
5.1.2.2 Critical Habitat...................................................................................................................................................8
5.1.2.3 Environmental Baseline.....................................................................................................................................8
5.2 CANDIDATE SPECIES........................................................................................................................................9
t5.2.1 Puget Sound/Strait of Georgia Coho Salmon........................................................................................9
5.2.1.1 Life History........................................................................................................................................................9
5.2.1.2 Critical Habitat...................................................................................................................................................9
' 5.2.1.3 Environmental Baseline.....................................................................................................................................9
6.0 EFFECTS OF THE ACTION.........................................................................................................................10
6.1 DIRECT IMPACTS............................................................................................................................................10
' 6.1.1 Fish Species:Bull Trout, Chinook, and Coho Salmon.........................................................................10
6.2 INDIRECT IMPACTS.........................................................................................................................................11
6.3 ANTICIPATED INTERRELATED, INTERDEPENDENT,AND CUMULATIVE IMPACTS............................................1 1
t 6.4 BENEFICIAL EFFECTS.....................................................................................................................................I I
6.5 RECOMMENDED CONSERVATION MEASURES.................................................................................................11
7.0 DETERMINATIONS OF EFFECT................................................................................................................12
' 7.1 LISTED THREATENED SPECIES .......................................................................................................................12
7.1.1 Coastal/Puget Sound Bull Trout..........................................................................................................12
7.1.2 Puget Sound ESU Chinook Salmon.....................................................................................................12
' 7.2 CANDIDATE SPECIES: PUGET SOUND/STRAIT OF GEORGIA COHO SALMON...................................................13
7.3 DESIGNATED CRITICAL HABITAT...................................................................................................................14
7.3.1 Puget Sound ESU Chinook Salmon.....................................................................................................14
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Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' 8.0 REFERENCES..................................................................................................................................................15
' APPENDIX A: FIGURES,TABLE, AND PHOTOS..........................................................................................A-1
APPENDIX B: SERVICES CORRESPONDENCE.............................................................................................B-1
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Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
1 .0 INTRODUCTION
1.1 Background Information
' Project Name: Renton Sunnydale Downstream Storm System
Replacement Project
' State: Washington
' County: King
City. Renton
' Location: SE '/4 Section 16, Township 23 North, Range 5
East
' Project Area: Downstream storm system replacement will
occur in an undeveloped area between the
southeast corner of Sunnydale Mobile Home
' Park and the intersection of SE 51" Street and
Newport Avenue SE, located in Renton,
Washington(Figure 1, Appendix A).
Proposed timing or schedule: Between June and September 2001
' Project Proponent: City of Renton
Surface Water Utility
1055 South Grady Way
' Renton, Washington 98055
Contact: Allen Quynn(425) 430-7247
Preparer: Adolfson Associates, Inc.
5309 Shilshole Avenue NW, Suite 200
' Seattle, Washington 98107
Contact: Ann Root(206) 789-9658
2.0 STUDY PURPOSE
On behalf of the City of Renton Surface Water Utility,the project proponent, Adolfson
' Associates, Inc. (Adolfson)has prepared this Biological Evaluation(BE)to facilitate
review of the proposed project as required by section 7(c) of the Endangered Species Act
(ESA). This BE has been prepared particularly to facilitate coordination between the
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Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' United States Army Corps of Engineers,the action agency, and the National Marine
Fisheries Service(NMFS) and the United States Fish and Wildlife Service (USFWS)
' jointly referred to as the Services. The NMFS regulates federally-listed threatened and
endangered marine wildlife and anadromous fish stocks. Threatened and endangered
terrestrial wildlife,plants, and inland fish stocks are under the jurisdiction of the USFWS.
' The purpose of this study is to determine the need for consultation or conference with the
Services by providing site-specific information regarding the proposed action; data on
listed,proposed, and candidate species; and a discussion of the effects of the proposed
' action on those species.
Information provided by NMFS (NMFS, 2000a) and USFWS (USFWS, 2000) indicates
' that the project will occur within the general range of the following species of concern:
Common Name cientific Name ESA Stym Em"
Coastal/Puget Sound Bull Salvelinus Threatened USFWS
Trout confluentus
' Puget Sound ESU Chinook Oncorhynchus Threatened NMFS
Salmon tshawytscha
Puget Sound/ Strait of Oncorhynchus Candidate NMFS
Georgia ESU Coho Salmon kisutch
' 3.0 STUDY OBJECTIVES
' This study has the following objectives:
• To review information on species within the action area. The document includes a
' review of literature on species life histories and discussions on the expected level of
species use based on information provided by public resource agencies. A
Washington Department of Fish and Wildlife (WDFW) Priority Habitats and Species
' Map was obtained for records of state priority species occurrence in the project area
(WDFW, 2000). The Washington Department of Natural Resources (WDNR) Natural
Heritage Program was also contacted for information on priority plants in the area
' (WDNR, 2000). A list of pertinent references is provided at the end of this report.
Agency correspondence with USFWS is provided in Appendix B.
' • To conduct a site survey of the project area in order to observe species habitat.
Adolfson planner Ann Root and biologist Kris Jaeger conducted a field review of the
project on August 15, 2000.
' • To assess the Properly Functioning Conditions (PFC) of streams within the action
area as described by NMFS (1998) and USFWS (1998). Estimates in the PFC
' assessment are based on observations made during the field visit, background
materials, and information provided by WDFW biologists. A PFC summary is
included in Appendix A of this BE (Table 1).
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Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' • To discuss direct, indirect, and interrelated and interdependent effects to the species
and habitats resulting from the proposed action, as well as to review known
' cumulative effects.
• To provide a recommendation with regard to effect determinations. If the action
' agency determines that a project "is likely to adversely affect" listed species or critical
habitat, then formal consultation is required unless an exception applies. If the action
agency determines that a project will have "no effect" or is "not likely to adversely
' affect" listed species or habitat, and the Services provide written concurrence, formal
consultation is not required.
' 4.0 DESCRIPTION OF PROPOSED ACTION AND ACTION AREA
' 4.1 Primary Project Features
' 4.1.1 Stormwater Pipe Replacement and Realignment
' The proposed project includes the replacement of an existing 700-foot long, 18-inch
corrugated metal stormwater pipe with approximately 800 feet of High-Density
Polyethylene (HDPE) 18-inch stormwater pipe. The stormwater pipe runs from the
' detention pond at the Sunnydale Mobile Home Park at Union Avenue down a ravine and
along an unnamed stream (Figures 2 and 3, Appendix A). The stormwater pipe
discharges into that stream near the intersection of SE 5ch Street and Newport Avenue SE,
' north of the Maple Valley Highway. The new stormwater pipe will be installed along a
different alignment at the same location. The current alignment of the pipe is buried for a
length of 160 feet along a flat section at the top of a slope. This section crosses two
Olympic Pipeline Company (OPLC) petroleum lines. The remaining portion of the
stormwater pipe is aboveground following the fall line down a steep slope (23 to 67
percent), crossing the stream on timber and steel cribbing, following a narrow shelf next
' to the stream, and discharging into the stream (Photos 1, 2 and 3). The upper 60 feet of
the aboveground pipe section has been partially crushed and the joints have separated
(Photos 4 and 5). Water leakage from this pipe section onto the steep slope has the
' potential to affect slope stability (Zipper Zeman, 2000).
The upper section of the stormwater pipe that is currently buried will be replaced in the
existing trench with a minimum one-foot clearance above the OPLC crossing. The
remaining section of the pipe will be constructed along a new alignment on the south side
of the stream. The new alignment will avoid the steeper portion of the slope and crossing
' the stream.
Replacement of the buried section of the pipe will require use of a backhoe and dump
' truck for shoring and excavation of the existing trench. Approximately 16 cubic yards of
controlled density fill will be installed in the trench to protect the existing OPLC
pipelines. Two rock buttresses are located on the slope adjacent to the upper detention
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' pond. These buttresses were installed to stabilize a small landslide on the slope between
the pond and the access road. The Geotechnical Engineering Study conducted for the
' project found no evidence of recent movement in the area and found that the rock buttress
appeared to be effective at controlling erosion(Zipper Zeman, 2000). One rock buttress
will be dismantled as part of the project and reassembled on site. Additional rock
' backfilling of the buttress may be required.
The above ground portion of the pipe will be laid from the top of the slope. The pipe
' segments will be lowered down the slope with cable and fused together. Staging areas
will be located on the existing maintenance roads at the top of the hill and at along the
lower portion of the stream. The construction and maintenance easement of the pipeline
' will be 15 feet wide.
' 4.1.2 Installation of Energy Dissipator
The existing stormwater pipe discharges directly into the stream with a drop of
' approximately 4 feet. The streambank and streambed have been eroded and scoured out
at the outfall (See Photo 3). The outfall will be relocated approximately 90 feet
downstream and replaced with an energy dissipator to reduce erosion and scour. The
' energy dissipator will consist of a riprap outfall. Approximately 20 cubic yards of soil
will be removed during outfall construction. To prevent impacts from sedimentation
during construction, a temporary headwall and 18-inch bypass pipe will be installed
' upstream of the site to divert flows around the construction site. The headwall will be
constructed of gravel sandbags and lined with plastic. The bypass pipe will discharge
approximately 15 feet downstream of the construction site. Two sandbag check dams
' will be placed in the stream downstream of the bypass pipe, approximately 50 feet apart.
The bypass pipe, headwall and check dams will be removed when the project is
completed.
4.1.3 Clearinq
' The project will require only minor clearing of shrubs, blackberries and grasses. No trees
will be removed. Shrubs and blackberries will be cleared at the top of the project where
' the pipe will be buried and along a portion of the aboveground alignment. Some grasses
will be disturbed during installation of the energy dissipator. All disturbed soils along the
easement corridor will be hydroseeded upon completion of the pipeline installation. The
' project will not require additional clearing for construction staging areas.
' 4.1.4 Removal of Existing Corrugated Metal Stormwater Pipe
The existing Corrugated Metal Pipe (CMP)will be removed as part of the project.
' Removal will include the cribbing, manholes and other structures. Because of the steep
slopes and to minimize disturbance of surrounding vegetation, the existing CMP and
other structures will be removed by hand.
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
4.2 Secondary Project Features
' 4.2.1 Timing, Noise, and Detours
The project is scheduled to occur during the summer of 2001 and is estimated to last 3 to
' 4 weeks. Work will occur between the hours of 7:00 a.m. and 4:00 p.m., Monday through
Friday. The project will require construction machinery typical of minor trenching
projects (backhoes, dumptrucks, etc.).Noise disturbances from the construction activity
' are anticipated to be typical of other small-scope construction projects and could be as
high as 90 dBA. These noise levels are expected for the duration of the construction.
The project will not require highly disruptive activities such as blasting or pile driving.
' No long-term noise will be generated by the project.
The proposed project will be accessed from existing maintenance roads and will not
' require a detour of road traffic on adjacent city streets.
' 4.2.2 Stormwater Pipe Operation and Maintenance
The proposed stormwater pipe will operate as a gravity flow pipe. The stormwater pipe
' will be incorporated into the regular maintenance schedule determined and conducted by
the City of Renton.
' 4.3 ACTION AREA AND HABITAT DESCRIPTION
' The action area includes all areas where work will take place and any adjacent areas that
may be affected by the proposed project. To account for federally-listed and candidate
fish species, the action area will include the aquatic environments of an unnamed
' tributary to the Cedar River, the potential mixing area of the Cedar River(100 yards
upstream and 2,000 yards downstream of its junction with the unnamed tributary), and all
terrestrial environments within one mile of the project area. The project area includes an
' approximately 15-foot wide corridor along the proposed alignment of the stormwater
pipe (Figure 3). The alignment for the stormwater pipe begins at a detention pond near
the southeast corner of the Sunnydale Mobile Home Park located west of Union Avenue
' in the City of Renton. The stormwater pipe will extend approximately 800 feet southwest
down a ravine and along an unnamed tributary of the Cedar River. The pipe will
discharge stormwater into the stream near the intersection of SE 5th Street and Newport
' Avenue SE, north of the Maple Valley Highway (Figure 3).
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Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
4.3.1 Environmental Baseline
'
4.3.1.1 Terrestrial Environment
' The proposed projected is located in an undeveloped ravine and riparian corridor. Slopes
in the ravine range from 23 to 67 percent. Vegetation consists of mixed deciduous and
evergreen trees, shrubs, ferns and grasses (See Photos 6 and 7). The shrub layer on the
' lower slope is dominated by blackberries (See Photo 8). Land use surrounding the
project area is characterized by the ravine and riparian corridor and by single family
' homes, maintained lawns, and landscaped, ornamental plantings.
4.3.1.2 Aquatic Environment
Unnamed Stream
' The stormwater pipe is laid in the riparian corridor and discharges into an unnamed
stream that is tributary to the Cedar River. The stream is unclassified on the King County
Sensitive Areas Map and not shown on USGS topographic maps of the area. It is
' identified as stream S-29 in the City of Renton's Critical Areas Ordinance. The stream is
a small perennial drainage fed by groundwater. It starts from a groundwater seep on the
slope of the ravine and discharges into the Cedar River approximately 0.5 mile
' downstream of the project site (Figure 2). Summer flows in the stream are less than 1 cfs
(See Photo 9). Below the project site,the creek flows west adjacent to a maintenance
road and approximately 1,300 feet below the project site, the stream flows into two
' detention ponds connected by a culvert (See Photo 10). The stream flows out of the last
detention pond through a standpipe and into a 24-inch stormpipe that flows
approximately 350 feet under the Maple Valley Highway and discharges into the Cedar
' River(Photo 11).
Within, and immediately downstream of the project area, the riparian corridor of the
' stream is dominated by mixed second-growth forest, shrubs, ferns and Himalayan
blackberry(Photos 6 and 7). Below the project area where the stream is ditched, the
riparian corridor is bordered by maintained lawns on the south and overgrown grasses on
the north (Photo 12). The stream is entirely culverted below the detention ponds. The
stream does not meet the criteria of properly functioning conditions for any of the
' parameters detailed in Table 1 (Appendix A). Instream habitat features are limited
throughout the stream due to its small size and presence of extensive culverted portions.
Anadromous fish species are precluded from the stream.
Cedar River
The Cedar River flows from its headwaters in the Cascade Mountains to Lake
' Washington. The upper reach of the river has been dammed at Chester Morse Lake to
provide drinking water supply for the City of Seattle. The upper Cedar River watershed is
protected as a public watershed and is closed to public access. In its lower reaches, the
' river is channelized and surrounded by extensive urban and industrial development in the
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' Renton Sunn dale Downstream Storm System Replacement Biological Evaluation
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' City of Renton. At its junction with the unnamed stream, the River is still relatively
undeveloped and meanders through a broad valley with steep slopes.
5.0 STATUS OF THE SPECIES AND CRITICAL HABITAT
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5.1 Threatened Species
5.1.1 Coastal/Puget Sound Bull Trout
' The historical distribution of bull trout extends from northern California to Alaska. In
Washington, bull trout are found throughout coastal and inland streams and lakes (WDW,
' 1991). Bull trout found in the Lake Washington drainage basin are part of the Coastal/
Puget Sound bull trout population, which was listed as a threatened fish stock under the
jurisdiction of USFWS in November 1999.
5. 1. 1. 1 Life History
' There are two general life history forms among bull trout: a resident form and a
migratory form. The individuals of the migratory form may be stream-dwelling (fluvial),
' lake-dwelling (adfluvial), or ocean- or estuarine-dwelling (anadromous) (USFWS, 1998).
Individuals of each form may be represented in a single population; however, migratory
populations may dominate where migration corridors and sub-adult rearing habitats are in
tgood condition(USFWS, 1998).
Bull trout are opportunistic feeders, consuming fish in the water column and insects on
the bottom (WDW, 1991). Stream temperatures and substrate conditions are very
' important for bull trout. Bull trout are most commonly associated with pristine or only
slightly disturbed basins (USFWS, 1998). Bull trout typically spawn from August
' through November in streams with clean gravel substrates and cold water temperatures
(less than 9 degrees Celsius). Redds are dug by females in water 8 to 24 inches deep, in
substrate gravels 0.2 to 2 inches in diameter (Wydoski and Whitney, 1979).
' 5. 1.1.2 Critical Habitat
' No critical habitat has been established or identified for coastal bull trout.
5.1.1.3 Environmental Baseline
' Low stream temperatures and clean substrates are key features of bull trout habitat. This
species is most commonly associated with pristine or only slightly disturbed basins
' (USFWS, 1998). The Bull Trout and Dolly Varden Appendix to the 1998 Salmonid Stock
Inventory (WDFW, 1998) states that reproducing populations of bull trout and Dolly
Varden within the Lake Washington Basin are limited to the upper Cedar River basin in
' Chester Morse Lake (WDFW, 1998). Although bull trout could occur in other drainages
October 2000 Page 7
Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' he Lake Washington basin the potential for bull trout presence within the
flowing into t g p
' Lake Washington basin is unlikely due to the high quality habitat parameters that the
species requires. The presence of culverts in the unnamed stream preclude bull
trout/Dolly Varden from the unnamed tributary.
' 5.1.2 Puget Sound ESU Chinook Salmon
' Chinook salmon have a historic range from the Ventura River in California to Point
Hope, Alaska in North America; and from Hokkaido, Japan to the Anadyr River in
Russia(Myers et al., 1998). Chinook salmon within the Lake Washington drainage basin
' are included in the Puget Sound chinook ESU, a population in Washington State
currently listed as threatened under the ESA.
' 5.1.2.1 Life History
Chinook salmon require varied habitats during different phases of their life. Spawning
' habitat typically consists of riffles and the tailouts of pools with clean substrates
dominated by cobbles located in the mainstem of rivers and large tributaries. Juvenile
chinook rear in the lower mainstem of rivers before entering the estuary and salt marshes
' (Busby et al., 1996). This is a period of intense growth; Shepard(1981) reports individual
juvenile chinook may grow from one percent to two percent a day in salt marsh
' environments. Fry emerge in the late winter and early spring. Juvenile chinook may rear
in freshwater from three months to two years (NMFS, 1998). Chinook generally migrate
to salt water in the spring and summer. Chinook spend from two to four years feeding in
' the North Pacific before returning to spawn.
5.1.2.2 Critical Habitat
' On March 17, 2000 NMFS designated critical habitat for Puget Sound ESU chinook
salmon. This critical habitat"includes all marine, estuarine, and river reaches accessible
to chinook salmon in Puget Sound"(NMFS, 2000b) including Lake Washington and its
tributaries.
' 5.1.2.3 Environmental Baseline
' The highest level of wild chinook spawning in the Lake Washington basin occurs in the
Cedar River and Bear Creek drainages (Williams et al., 1975; WDFW, 1994; Carrasco et
al., 1999). Chinook salmon are not expected to occur in the unnamed tributary of the
' Cedar River. Stream size and gradient and presence of culverts in the tributary are not
typical of stream systems that support chinook salmon. Chinook salmon found in Lake
Washington primarily spawn in the Cedar River, Issaquah Creek, and several tributaries
' in north Lake Washington(WDFW, 1994). Chinook are expected to occur in Lake
Washington throughout the year either as rearing juveniles, or migrating smolts and
adults.
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Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' 5.2 Candidate Species
' 5.2.1 Puget Sound/Strait of Georgia Coho Salmon
' Coho salmon are currently a candidate fish stock. No protection for candidate stocks is
afforded under the ESA, and section 7 consultation or conference with NMFS is not
required for anticipated impacts to these species. Summary information for this
' candidate species is included herein in the event this species becomes listed or proposed
prior to project completion.
' 5.2.1.1 Life History
Coho salmon are anadromous, and occur in most major river basins around the Pacific
' Rim from central California to Korea and northern Hokkaido, Japan (Weitkamp et al.,
1995). Adult coho salmon spawn in freshwater streams in the late fall and mid-winter.
' Coho typically spawn in low gradient riffles with clean substrates ranging from pea-sized
gravels to orange-sized cobbles (Henry, 1995). Rearing juveniles prefer off-channel
pools with complex cover including both large and small woody debris (Henry, 1995).
' Juvenile coho rear in freshwater for 12 to 18 months. Smolts migrate to the ocean in the
spring of their second year. Most male, and all female coho salmon, spend from 16 to 20
months rearing in the ocean before returning to spawn in fresh water as three-year old
' adults.
' 5.2.1.2 Critical Habitat
No critical habitat has been proposed for Puget Sound/Strait of Georgia ESU coho
salmon.
5.2.1.3 Environmental Baseline
' Coho salmon generally utilize almost all accessible tributaries draining into Lake
Washington (WFW, 1994). However, the extensive culverts preclude coho salmon from
' utilizing the unnamed tributary. Coho salmon likely are present in the Cedar River near
the outlet of the unnamed stream throughout the year. Coho utilize the Cedar River as
foraging habitat either while rearing or migrating to and from upstream spawning and
' rearing grounds (WDFW, 1994).
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' 6.0 EFFECTS OF THE ACTION
' 6.1 Direct Impacts
' 6.1.1 Fish Species: Bull Trout, Chinook, and Coho Salmon
' Bull trout, chinook, or coho salmon are precluded from the unnamed stream. Similar
streams are often used by salmonids for rearing; however, conditions in this stream make
it impossible for salmonids to utilize the stream. The stream is separated from the Cedar
' River by a standpipe leading from a detention pond and 350 feet of culvert (Photo 8).
The channel lacks suitable substrate, summer flows, and other instream habitat features
preferred by these fish species. The nearest location to the project area where listed and
' candidate fish occur is in the Cedar River, approximately 0.5 mile downstream from the
project area. There is a potential for adult and juvenile chinook and coho salmon to be
present in the Cedar River both during and after project construction. Although bull trout
' are not precluded from the lower Cedar River, existing habitat conditions create less
potential for bull trout to occur in the Cedar River during and after the proposed
construction activities. The action area does not contain suitable spawning habitat for
' bull trout, chinook, or coho salmon. Despite species occurrence within the Cedar River
and the action area, direct impacts to listed and candidate species are expected to be
negligible.
Potential direct impacts will be related to construction activities. Installation of the new
stormwater pipe, energy dissipator, and removal of the existing stormwater pipe and
' structures includes trenching and filling near the unnamed stream and temporary
diversion of the stream and excavation in a portion of the unnamed stream. Impacts as a
result of these activities would be related to construction-generated sediment entering
portions of the unnamed stream downstream of the project area and eventually depositing
into the Cedar River. Construction-generated sediment that may enter the Cedar River
could result in a temporary and localized increase in turbidity near the outlet of the
' unnamed stream into the river. The potential level of construction-related sediment that
could enter the Cedar River is expected to be negligible. Best Management Practices
(BMPs) and a Temporary Erosion and Sediment Control Plan (TESC) will be
' implemented to ensure that construction-related sediment and pollution will be contained
on-site. Best Management Practices include the installation of sediment fences or other
filtration fabric between all areas of exposed soil and downstream portions of the
' unnamed stream. During outfall construction,the stream will be bypassed around the
construction site and temporary check dams will be placed in the stream downstream of
the construction site. Also, there are currently two detention ponds downstream of the
' project that will further settle out any sediments in the stream. In addition, construction
activities will be limited to the summer months. At this time, flow in the stream and
stormwater volumes discharging to the stream are expected to be low and salmonid
' migration will not be occurring.
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
6.2 Indirect Impacts
' The proposed project will not result in short or long-term indirect impacts to listed or
candidate fish species. The project will not result in an increase in existing impervious
surface within the project area and will not increase stormwater discharge volumes to the
' unnamed stream. Peak flows in the stream will not be impacted as a result of the
proposed activities.
' 6.3 Anticipated Interrelated, Interdependent, and Cumulative Impacts
' The proposed project will not result in the creation of new services or the expansion of
existing services. Although improvements to stormwater systems can lead to increased
development, no such development will occur as a result of this project. The proposed
' project will replace an existing damaged corrugated metal stormwater pipe with a HDPE
pipe. The new pipe and alignment is expected to eliminate the potential for landslides on
the steep slope that may result from leaking of the existing pipe and reduce the potential
' for erosion along the streambank. The new energy dissipator where the stormwater pipe
discharges into the stream should reduce erosion in the streambed. No interrelated,
interdependent, or cumulative impacts are associated with this project.
6.4 Beneficial Effects
' The NMFS and USFWS (1998) identify beneficial effects as actions which"are
contemporaneous positive effects without any adverse effects." While the conservation
' measures presented in subsequent sections of this document are expected to result in
some benefits, these are not considered"beneficial effects" since they are intended to
avoid or minimize anticipated adverse effects. No beneficial effects have been identified
tas likely to occur as a result of the proposed action.
' 6.5 Recommended Conservation Measures
The project is not anticipated to result in a long-term degradation of instream conditions
t in the unnamed stream or the Cedar River. Potential short-term impacts are expected to
be limited to temporary minor and local sedimentation increases to the Cedar River
during construction activities. A number of conservation measures are recommended to
' minimize potential impacts to listed species during and after construction.
1. To reduce potential direct impacts due to erosion and sedimentation, construction is
scheduled for the summer, the region's typical dry season.
' 2. To reduce impacts during construction of the outfall and energy dissipator, the stream
will be temporarily bypassed around the construction area.
' I To further avoid potential direct impacts through erosion and sedimentation, the
extent of vegetated area that will be cleared and graded will be minimized where
possible. A Temporary Erosion and Sedimentation Control Plan (TESCP), which
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' includes the installation of sediment fences and other BMPs, will be developed to
limit construction-related impacts.
t4. A Spill/Pollution Prevention Plan will be implemented to mitigate potential
sedimentation and construction-related pollution to the unnamed stream and the
' Cedar River.
7.0 DETERMINATIONS OF EFFECT
1
7.1 Listed Threatened Species
7.1.1 Coastal/Puget Sound Bull Trout
' The proposed installation of a replacement stormwater pipe from the Sunnydale Mobile
Home Park and removal of the existing pipe "may affect, but is not likely to adversely
' affect" coastal/Puget Sound bull trout.
A"may affect" determination is warranted based on the following rationale:
' 1. There is a small potential for anadromous bull trout to be present foraging in the
lower portion of the Cedar River during the project construction window.
' 2. There is a potential for temporary and localized turbidity in the Cedar River near the
outfall of the unnamed stream as a result of construction-generated sedimentation.
' A "not likely to adversely affect" determination is warranted based on the following
rationale:
1. Existing instream habitat conditions and the presence of culverts preclude bull trout
' from the unnamed stream. Potential bull trout presence in the action area is limited to
Lake Washington, over 3 miles downstream of the project area.
2. The potential increased turbidity as a result of construction activities is expected to be
' minor, temporary, and limited to the immediate vicinity of the Dutfall of the unnamed
stream in the Cedar River.
t 3. Construction-generated sediment that could contribute to increased turbidity in the
Cedar River will be contained on site through implementation of BMPs and a TESC
plan. Specific BMPs include the installation of sediment fences between areas of
' work and downstream portions of the unnamed stream and a temporary bypass of the
stream during outfall construction. The existing detention ponds will also settle out
sediments before the stream enters the Cedar River.
' 7.1.2 Puget Sound ESU Chinook Salmon
' The proposed replacement of the installation of the new stormwater pipe "may affect, but
is not likely to adversely affect" Puget Sound ESU chinook salmon.
1
October 2000 Page 12
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' A "may affect" determination is warranted based on the following rationale:
1. There is a small potential for chinook salmon to be present foraging in the Cedar
River during the project construction window.
' 2. There is a potential for temporary and localized turbidity in the Cedar River near the
outfall of the unnamed stream as a result of construction-generated sedimentation.
' A "not likely to adversely affect" determination is warranted based on the following
rationale:
1. Existing instream habitat conditions and the presence of culverts preclude chinook
' salmon from the unnamed stream. Chinook presence in the action area is limited to
the Cedar River, 0.5 mile downstream of the project area.
' 2. The potential increased turbidity as a result of construction activities is expected to be
minor, temporary, and limited to the immediate vicinity of the outfall of the unnamed
stream in the Cedar River.
' 3. Construction-generated sediment that could contribute to increased turbidity in the
Cedar River will be contained on site through the implementation of BMPs and a
TESC plan. Specific BMPs include the installation of sediment fences between areas
' of work and downstream portions of the unnamed stream and temporary bypass of the
stream during outfall construction. The existing detention ponds will also settle out
sediments before the stream enters the Cedar River.
7.2 Candidate Species: Puget Sound/Strait of Georgia Coho Salmon
tThe proposed installation of the new stormwater pipe and removal of the existing pipe "is
not likely to significantly impact"Puget Sound/Strait of Georgia coho salmon
' "populations, individuals or suitable habitat."
This determination is warranted based on the following rationale.
' 1. There is a small potential for anadromous coho salmon to be present foraging in the
Cedar River during the project construction window.
2. There is a potential for temporary and localized turbidity in the Cedar River near the
outfall of the unnamed stream as a result of construction-generated sedimentation.
' 3. Existing instream habitat conditions and the presence of extensive culverts preclude
coho salmon from the unnamed stream. Coho presence in the action area is limited to
the Cedar River, 0.5 mile downstream of the project area.
' 4. The potential increased turbidity as a result of construction activities is expected to be
minor, temporary, and limited to the immediate vicinity of the outfall of the unnamed
' stream in the Cedar River.
5. Construction-generated sediment that could contribute to increased turbidity in the
' Cedar River will be contained on site through the implementation of BMPs and a
October 2000 Page 13
Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' TESC plan. Specific BMPs include the installation of sediment fences between areas
of work and downstream portions of the unnamed stream and temporary bypass of the
' stream during outfall construction. The existing detention ponds will also settle out
sediments before the stream enters the Cedar River.
' 7.3 Designated Critical Habitat
t7.3.1 Puget Sound ESU Chinook Salmon
' The proposed project"will not result in the destruction or adverse modification of
designated"Puget Sound ESU chinook salmon"critical habitat."
' This determination is warranted based on the following rationale:
1. The potential increase in turbidity caused by sedimentation from the storm water pipe
' is not expected to alter existing baseline conditions within the Cedar River.
2. The proposed project will not alter the aquatic environment within the Cedar River.
1
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' October 2000 Page 14
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
8.0 REFERENCES
' Busby P. J., T. C. Wainwright, G. J. Bryant, L. J. Lierheimer, R. S. Waples, F. W.
Waknitz, and I. V. Lagomarsino 1996. Status Review of West Coast Steelhead from
' Washington, Oregon, and California. NOAA Technical Memorandum NMFS-NWFSC-
27. Seattle, Washington.
' Carrasco, K., S. Foley, B. Mavros, and K. Walter. 1999. 1998 Chinook Spawner Survey Data
Technical Report for the Lake Washington Watershed. King County Department of
Natural Resources. Washington State Department of Fish and Wildlife and
' Muckleshoot Indian Tribal Fisheries Department.
Henry, R. 1995. Backgrounder: Coho Salmon and the State Endangered Species Act Special
' Publication. Portland, Oregon: Oregon Department of Fish and Wildlife.
Myers, J.M., R.G. Kope, G.J. Bryant, D. Teel, L.J. Lierheimer, T.C. Wainwright, W.S. Grand,
' F.W. Waknitz, K. Neely, S.T. Lindley, and R.S. Waples. 1998. Status Review of
Chinook Salmon from Washington, Idaho, Oregon, and California. U.S. Department of
Commerce,NOAA Tech. Memo. NMFS-NWFSC-35.
tNational Marine Fisheries Service. 1998. SO CFR Parts 222, 226, and 227, Endangered and
Threatened Species: West Coast Chinook Salmon Listing Status Change; Proposed Rule.
' National Marine Fisheries Service -NOAA.
National Marine Fisheries Service. 2000a. United States Department of the Interior,National
' Marine Fisheries Service,Northwest Region Habitat Conservation Division,Northwest
Region Species List. http://www.nwr.noaa.Qob/lhabcoiVhabweb/listllwr.htm. Updated
August 16, 1999.
' National Marine Fisheries Service. 2000b. United States Department of the Interior, National
Marine Fisheries Service,Northwest Region Habitat Conservation Division,Northwest
' Region Protected Species Division.
http://www.nwr.noaa.Qov/lsalmon/salmesa/chint)ug.htm. Updated September 9, 1999.
' Shepard, M.F. 1981. Status Review of the Knowledge Pertaining to the Estuarine Habitat
Requirements and Life History of Chum and Chinook Salmon Juveniles in Puget Sound.
Washington Cooperative Fishery Research Unit. College of Fisheries, University of
Washington.
' United States Department of the Interior Fish and Wildlife Service USFWS . 1998. A
p ( )
Framework to Assist in the Making of Endangered Species Act Determinations of Effect
' for Individual or Grouped Actions at the Bull Trout Subpopulations Watershed Scale
(Draft).
' Washington Department of Fish and Wildlife (WDFW). 1998. Washington Salmonids Stock
Inventory: Bull Trout/Dolly Varden Appendix. Olympia, Washington.
October 2000 Page 15
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
Washington Department of Fish and Wildlife (WDFW). 2000. Priority Habitats and Species
Map. Habitat Program. Olympia, Washington.
' Washington Department of Fisheries (WDF), Washington Department of Wildlife, and Western
Washington Treaty Indian Tribes. 1994. 1992 Washington State Salmon and Steelhead
Stock Inventory. Olympia, Washington.
Washington Department of Natural Resources (WDNR). 2000 Natural Heritage Information
' System Datasearch. Olympia, Washington.
Washington Department of Wildlife. 1991. Management Recommendations for Washington's
' Priority Habitats and Species. Wildlife Management, Fish Management, and Habitat
Management Divisions. Olympia, Washington. May 1991.
' Weitkamp, L.A., T.C. Wainwright, G.J. Bryant, G.B Milner, D.J Teel, R.G. Kope, R.S. Waples.
1995. Status Review of Coho Salmon from Washington, Oregon, and California. U.S.
Dept. Commerce,NOAA Tech. Memo. NMFS-MWFS-24.
' Williams, R.W., R.M. Laramie, and J.J. James. 1975. A Catalog of Washington Streams and
Salmon Utilization: Volume 1, Puget Sound Region. Olympia, Washington: Washington
' State Department of Fisheries.
Wydoski, R.S. and R.R. Whitney. 1979. Inland Fishes of Washington. Seattle, Washington:
' University of Washington Press.
Zimmer Zepman. 2000. Draft Field Exploration and Geotechnical Engineering Study.
' Lynnwood, Washington.
1
October 2000 Page 16
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rRenton Sunnydale Downstream Storm System Replacement Biological Evaluation
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r APPENDIX A: FIGURES, TABLE, AND PHOTOS
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October 2000 Appendix A
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
Table 1: Summary of Baseline Conditions within Unnamed Tributary to Cedar River
t Pathways: Environmental Effects of the
Baseline Action(s)
Properly At Not Restore Maintain Degrade
' Indicators Functioning risk Properly
Functioning
Water Quality
' Temperature X X
Sediment X X
Chemical X X
' Habitat Access
Physical Barriers X X
Habitat Elements
Substrate X X
' LWD X X
Pool Frequency X X
Pool Quality X X
' Refugia X X
Off-channel Habitat N/A X
Channel Condition and
' Dynamics
Width/Depth Ratio X X
Streambank Condition X X
' Floodplain Connectivity N/A X
Flow/Hydrology X
Peak/ Base Flows X X
' Drainage Network X X
Increase
Watershed Conditions
Road Density/Location X X
Disturbance History X X
Riparian Reserves X X
1
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October 2000 Page A-1
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
KK;
Zi
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Photo 1: Existing stormwater pipe at stream crossing. August 2000.
'
j ..�" :•• '" - Via. "-- �.s•
1
' Photo 2: Existing stormwater pipe lying along shelf above the creek. August 2000.
October 2000 Page A-2
1
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
-
e4, A
r r le 414
ir
41 �.
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i
Photo 3: Outfall pipe into stream. Area has been eroded and scoured by discharge.
August 2000.
• r- -
1 _ _
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Photo 4: Area of stormwater pipe damaged by fallen tree. August 2000.
1
October 2000 Page A-3
1
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' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
PIN_
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' Photo 7: Ferns and shrubs along the unnamed stream. August 2000.
d P'
�.*
lr.
Photo 8: Himalayan blackberries dominate lower streambanks. August 2000.
October 2000 Page A-5
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
' Photo 9: Low summer flows in unnamed stream. August 2000.
' } 4-
Photo 10: Lower detention pond and culvert leading to Cedar River. August 2000.
1
October 2000 Page A-6
Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
: 1 • yyy -
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Photo 11: Standpipe entrance to culvert leading to Cedar River. August 2000.
October 2000 Page A-7
1
Renton r Downstream StormReplacement Biological Evr r r
.� �:', �„J•`;,,,� a `���
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Photo 12: Grasses along unnamed stream below the project area. August 2000.
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Octoler 2000 'r•
' Renton Sunnydale Downstream Storm System Replacement Biological Evaluation
1
' APPENDIX B: SERVICES CORRESPONDENCE
1
1
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October 2000 Appendix B
1
1
N a OF T
' United States Department of the Interior
9
N
7 _�
FISH AND WILDLIFE SERVICE
�4RCH 3 BA9
Western Washington Office
510 Desmond Drive SE, Suite 102
' Lacey, Washington 98503
Phone: (360) 753-9440 Fax: (360) 534-9331
' SEP 12 2000
Dear Species List Requester:
You have requested a list of listed and proposed threatened and endangered species, candidate
' species and species ofconcem(Attachment A)that may be present within the area of your proposed
project. This response fulfills the requirements of the U.S.Fish and Wildlife Service(Service)under
section 7(c) of the Endangered Species Act of 1973, as amended (Act). We have also enclosed a
' copy of the requirements for Federal agency compliance under the Act (Attachment B).
Should the Federal agency determine that a listed species is likely to be affected (adversely or
' beneficially) by the project, you should request section 7 consultation through this office. If the
Federal agency determines that the proposed action is"not likely to adversely affect"a listed species,
you should request Service concurrence with that determination through the informal consultation
' process. Even if there is a "no effect" situation, we would appreciate receiving a copy for our
information.
' Species of concern are those species whose conservation standing is of concern to the Service, but
for which further status information is still needed. Conservation measures for species of concern
are voluntary, but recommended. Protection provided to these species now may preclude possible
listing in the future.
' There may be other federally listed species that may occur in the vicinity of your project which are
under the jurisdiction of the National Marine Fisheries Service (NMFS). Please contact NMFS at
(360) 753-9530 to request a species list.
' In addition, please be advised that federal and state regulations may require permits in areas where
wetlands are identified. You should contact the Seattle District of the U.S.Army Corps of Engineers
' for Federal permit requirements and the Washington State Department of Ecology for State permit
requirements.
Your interest in endangered species is appreciated. If you have additional questions regarding your
' responsibilities under the Act, please contact Yvonne Dettlaff(360) 753-9582 or Bobbi Barrera
(360) 753-6048.
' Sincerely,
' Gerry A. Jac son, Manager
Western Washington Office
' Enclosure(s)
' cc: WDFW Region 4
COE
1
' ATTACHMENT A September 05, 2000
' LISTED AND PROPOSED ENDANGERED AND THREATENED SPECIES,
CANDIDATE SPECIES AND SPECIES OF CONCERN
' WHICH MAY OCCUR WITHIN THE VICINITY OF THE PROPOSED
RENTON/SUNNYDALE STORM WATER PIPE REPLACEMENT PROJECT
IN KING COUNTY,WASHINGTON
(T23N R05E S16)
FWS REF: 1-3-00-SP-1802
' LISTED
Bull trout (Salvelinus confluentus) - occur in the vicinity of the project.
' Major concerns that should be addressed in your biological assessment of the project impacts to
listed species are:
' 1. Level of use of the project area by listed species.
' 2. Effect of the project on listed species' primary food stocks, prey species, and
foraging areas in all areas influenced by the project.
' 3. Impacts from project construction(i.e.,habitat loss,increased noise levels,increased
human activity) which may result in disturbance to listed species and/or their
avoidance of the project area.
' PROPOSED
None.
CANDIDATE
' None.
' SPECIES OF CONCERN
' The following species of concern may occur in the vicinity of the project:
Long-eared myotis (Myotis evotis)
Long-legged myotis (Myotis volans)
Pacific lamprey (Entosphenus tridentata)
' River lamprey (Lampetra ayresi)
1
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r
ATTACHMENT B
' FEDERAL AGENCIES' RESPONSIBILITIES UNDER SECTIONS 7(a) AND 7(c)
OF THE ENDANGERED SPECIES ACT OF 1973,AS AMENDED
SECTION - n e 7(a) Consultation/Co f rence
Requires: l. Federal agencies to utilize their authorities to carry out programs to conserve endangered and
threatened species;
2. Consultation with FWS when a federal action may affect a listed endangered or threatened
species to ensure that any action authorized, funded, or carried out by a federal agency is not
likely to jeopardize the continued existence of listed species or result in the destruction or
adverse modification of critical habitat. The process is initiated by the federal agency after it
has determined if its action may affect (adversely or beneficially) a listed species; and
' 3. Conference with FWS when a federal action is likely to jeopardize the continued existence of
a proposed species or result in destruction or an adverse modification of proposed critical
' habitat.
SECTION 7(c) - Biological Assessment for Construction Projects
t Requires federal agencies or their designees to prepare a Biological Assessment BA for construction project
s only.
' The purpose of the BA is to identify any proposed and/or listed species which is/are likely to be affected by a
construction project. The process is initiated by a federal agency in requesting a list of proposed and listed
threatened and endangered species(list attached). The BA should be completed within 180 days after its initiation
' (or within such a time period as is mutually agreeable). If the BA is not initiated within 90 days of receipt of the
species list, please verify the accuracy of the list with the Service. No irreversible commitment of resources is to
be made during the BA process which would result in violation of the requirements under Section 7(a) of the Act.
' Planning, design, and administrative actions may be taken; however, no construction may begin.
To complete the BA,your agency or its designee should: (1)conduct an onsite inspection of the area to be affected
by the proposal, which may include a detailed survey of the area to determine if the species is present and whether
suitable habitat exists for either expanding the existing population or potential reintroduction of the species; (2)
review literature and scientific data to determine species distribution, habitat needs, and other biological
' requirements; (3) interview experts including those within the FWS, National Marine Fisheries Service, state
conservation department, universities, and others who may have data not yet published in scientific literature; (4)
review and analyze the effects of the proposal on the species in terms of individuals and populations, including
consideration of cumulative effects of the proposal on the species and its habitat; (5)analyze alternative actions that
may provide conservation measures; and (6) prepare a report documenting the results, including a discussion of
study methods used,any problems encountered,and other relevant information. Upon completion,the report should
' be forwarded to our Endangered Species Division, 510 Desmond Drive SE, Suite 102, Lacey, WA 98503-1273.
"Construction project" means any major federal action which significantly affects the quality of the human
' environment (requiring an EIS), designed primarily to result in the building or erection of human-made structures
such as dams, buildings, roads, pipelines, channels, and the like. This includes federal action such as permits,
' grants, licenses, or other forms of federal authorization or approval which may result in construction.
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