The URL can be used to link to this page

Home My WebLink AboutHMP - HMP Habitat Managment Plan - 11/23/2011 Takegami & Wennemark Float Project Habitat Management Plan November 23, 2011 For: Kent Takegami 8 Cynthia Wennemark and NWSE Holdings LLC 1001 Cooper Point Road Olympai, WA 98502 Prepared by: Marine Surveys It Assessments 521 Snagstead Way Port Townsend,WA 98368 Phone: (360) 385-4073 E-mail: marine.surveys.inc@gmail.com List of Figures FigureNumber.................................................................................Page 1. Project location...................................................................................6 3. Elevation view of the proposed float...............................................7 3. Float functional grating calculations...............................................8 AttachmentNumber.......................................................................Page 1. Habitat Survey ..............................................................................9-13 2. Habitat Survey Map..........................................................................14 MS&A Takegami and Wennemark Float Project • 2 l Information for the Takegami & Wennemark Float Project that is relevant to the Habitat Management Plan Project Location: 181 E.Bergeson Rd., Shelton WA 98584. NW'/4 Section 3,Township 20 N,Range 02 N 47,25891, W 122.91355. Parcel#22003-12-90120(Figure 1) Description of the nature,density and intensity of the proposed use. The proposed project involves the construction of a single float on Pickering Passage.The proposed float will measure 8'x W.The float will have 123.2 ftz(51.3%)of functional grating installed(Figure 3).The structure will be secured with two helix screw anchors(Figure 2).The structure will be anchored approximately 230' from the beach/bluff interface at a depth of approximately—11.0'(NIILW). The proposed structure will be used by the applicants for boating,fishing and other water-related activities. Effects analysis of the proposed use or activity on fish and wildlife and their habitat. The following is a discussion of the possible impacts on Puget Sound chinook,bull trout and Puget Sound steelhead.These are the primary species that may be impacted by the construction and use of the proposed structure. Installation of the helix screw anchors:The helix screw anchors will be driven into the substrate with a remote hydraulic power head.A hydraulic power unit run by a small gasoline engine will be located in a 24' workboat.Hoses lead down to the hydraulic power head on the bottom.A diver uses this unit to drive the screw anchors into the substrate.The installation will take approximately 30 min.per screw anchor. Two 1"double braded nylon lines with mid-line floats and 10'of chain with a swivel at the top will connect the float to the helix anchors(Figure 2). Turbidity and noise: There will be a brief,slight increase in noise from the powerboat used to deliver the float and helix anchors to the site.In addition there will be a brief(approximately one hour)slight increase in noise from the hydraulic power unit used to drive the helix screw anchors into the substrate.This noise is less than that produced by normal powerboat traffic in Puget Sound. The presence of the anchors and anchor lines is expected to have minimal impact on the surrounding benthic environment.The mid-line floats will prevent the lines from scouring the surrounding substate.In addition,as seen in the Habitat Map and Habitat Survey(Attachments 1 and 2),there is almost no macroalgae in the vicinity of the proposed anchored float.The moored vessel will not ground out. Salmonid migratory pathway alteration: The float will be located approximately 23V offshore at a-11.0' tidal elevation(MLLW).Therefore,there should be few,if any,impacts on migrating salmonids using the more shallow nearshore area.As noted by Weitkamp(2003),young chinook,chum and pink salmon appear to use nearshore,shallow water(2-3 meters in depth)as they migrate through estuaries.Therefore,the installation and the presence of the float will have no effects on salmonid migration. MS&A Takegami and Wennemark Float Project• 3 L Increased predation: At this time,there is no evidence of floats aggregating salmonid predators in the Puget Sound(Ratte& Salo 1985; Cardwell et al. 1980;Nightingale and Simenstad 2001 and Williams et al. 2003). Dock associated structures, such as breakwaters, may serve as marine mammal haulout areas, but there is no scientific literature that states that these mammals are particularly targeting small outmigrating juveniles. It might be assumed that birds would be interested in small migrating juveniles, but there is no evidence that docks provide an aggregation site for predatory birds(Taylor and Willey 1997). One of the concerns about the impacts of overwater structures located in the nearshore area on migrating salmon is that the will be forced to move out in to nto deeper water, where the will be cons umed umed b predatory P Y Y P r1' fish species. However, as mentioned above, this float will be located in deep water and 230' from shore. Shading and crushing impacts: Shading caused by overwater structures and float grounding can reduce or eliminate eelgrass, macroalgae and other epibenthic organisms. The following design parameters will minimize both shading and crushing impacts on the benthic environment: •The float will have 51.3 %functional grating installed • The float will be located in deep water where shading impacts are minimal. • Grounding impacts will not occur. Boating impacts: Boating activity can cause damage to the aquatic habitat due to prop scour and increased turbidity. In several studies,aquatic vegetation and benthic organisms were found to be absent or greatly reduced in areas where boat traffic was high and the propellers were within one foot of the bottom(Chumra and Ross 1978; Ogilvie 1981).Langler(1950)found that propellers within approximately 14"of the bottom removed all plants and silt within a swath approximately 5'wide. Conversely, boat use over deeper water can actually stimulate aquatic plant growth by increasing the dissolved carbon dioxide and increasing water circulation(Warrington 1999). Again, the float will be located in deep water,which makes boating impacts on the benthic environment highly unlikely. In addition,very little macroalgae and no eelgrass was noted in the survey area.Therefore,scouring impacts should not be an issue.. Plan for avoiding,minimizing and/or mitigation adverse impacts The following factors indicate how the applicants will avoid, minimize and/or mitigate adverse impacts to fish species and their habitat: •The float will have 51.3 %functional grating installed. • The float will be oriented in an approximate north south direction,which will further minimize shading impacts. • Mid-line floats on the ground tackle will prevent scouring impacts on the benthic environment. • The float will be located approximately 230' from shore at a tidal elevation of-11.0'(MLLW), which will minimize any impacts on migrating salmonids well as shading and scouring impacts on the benthic environment. MS&A Takegami and Wennemark Float Project • 4 References: Cardwell R.D., S.J.Olsen,M.I. Carr and E.W. Sanborn. 1980.Biotic,water quality and hydrologic characteristics of Skyline Marina in 1978.TechRep. 54,Washington Dept.of Fisheries. Chumra, G. L. and N. W. Ross. 1978.The environmental impacts of marinas and their boats.A literature review with management implications,Marine Advisory Service,University of Rhode Island.Narragansett, RI. Langler,K.F.,A. S.Hazzard, W. E.Hazen and W.A.Tompkins. 1950. Outboard motors in relation to fish behavior, fish production and angling success. Transactions of the 15th Annual North American Wildlife Conference. pp. 280-303. Nightingale, Barbara and Charles Simenstad. 2001b. Overwater structures: marine issues. Submitted to Washington Department of Fish and Wildlife, Washington Department of Ecology,and Washington State Department of Transportation,Olympia, WA, 177 pp. Ogilvie,M. A. 1981.The mute swan in Britain, 1978.Bird Study. 28: 87 - 106. Ratte,L. and E.O. Salo. 1985.Under-pier ecology of juvenile Pacific salmon in Commencement Bay.Report to Port of Tacoma, FRI-UW-8508,Fish.Res.Inst. UW, Seattle,WA. Weitkamp,Don E. September 2003.Young Pacific Salmon in Estuarine Habitats. Review Draft.Parametrix, Inc. Kirkland, WA. Williams,G. D.,R. M.Thom,D.K. Shreffler, J.A. Southard,L.K. O'Rourke,S. L. Sergeant,V.I. Cullinan,R. Moursund,and M. Stamey.Assessing Overwater Structure-Related Predation Risk on Juvenile Salmon: Field Observations and Recommended Protocols. September 2003. Prepared for the Washington State Department of Transportation Under a Related Services Agreement With the U.S. Department of Energy Under Contract DE- AC06-76RLO 1830. MS&A Takegami and Wennemark Float Project • 5 l Figure 1. Site location •1 \ ' '.i nl l�.�1 J /�N• - ~ .�.t Ili sun PO"t Gad (i 1 �n 7. 41, ;F �T T N� IE / C PROJE � ./ _ - ,— • is 1 .; ;� ��'� — /'> _��'' �� ,� �:� t1J _•,--...�lqr� r if tJ �1 ` •�`_ ..fit t.r l' vs 1. I� IJ? l•• , ;'' 122057'00" W 122056'00" W 122055'00" W WGS84 122"53'00" W 1 IVIN 0 7 J2 1 MILE 190 Om 10w- Printed f om TOPO!01999 Wildflower Prcductiams(www.topa-cam) Proj ect • 6 MS�A Takegami and Wennemark Float P l Figure 2. Elevation view 30' ENVIROTUFFTH DOCK SYSTEM MOISTURESHIELD RPL DECKING FIBERGLASS GRATING MHHW 14.4' GALVINIZED CHAIN FIRST 10' 1' NYLON LINE MLLW 0' -4' INSTALL MIDLINE FLOATS DEPTH -11' HELIX ANCHOR SYSTEM SECTION VIEW Lattitude: 47deg 15'1.37"N Scale: I"=10' Longitude: 122deg 55'14.1' MSitA Takegami and Wennemark Float Project • 7 I Figure 3. Float functional grating 30' 5 8' 4' 8, 5' ap NL (1) OF (2) 2.5X7.5 STRINGERS cl) OF (4) 1.5X7.5 (1) OF (2) 1.5X7.5 STRINGERS SPLICE BOARDS (1) OF (2) 2.5X7.5 VALERS (1) OF (2) 2.5X9.5 FASCIA CALCULATION OF_GROSS_GRATED AREA CALCULATION OF GROSS FRAMING AREA 5'X2' = 10 SO. FT X 2 SECTIONS = 20 SO. FT. 2.5'X30' STRINGER = 6 SO. FT X 2 = 12 SO. FT. 8'X8' = 64 SO. FT. X 2 SECTIONS = 128 SO. FT. 1.5'X8' STRINGER = 1 SO. FT. X 4 = 4 SO. FT. 4'X2' = 8 SO. FT. (MIDDLE SECTION) 2.5'X8' WALERS = 1.7 SO. FT. X 4 = 6.8 SO. FT. 20 + 128 + 8 = 156 M FT GROSS AREA 2.5'X8' FASCIA = 1.7 SO. FT. X 4 = 6.8 SO. FT. 1.5'X6'-8' SPLICE BOARD = .8 SO. FT. X 4 = 3.2 SO. F TOTAL FRAMING = 32.9 SO. FT. C'ALCULATI❑N OF FUNCTIONAL GRATED AREA GROSS GRATED AREA 156 S0. FT. GROSS FRAMING AREA -32.8 SO. FT. TOTAL = 123.2 SO. FT. FUNCTIONAL GRATING 123.2 SO. FT. GROSS FLOAT AREA + 240 SO. FT. TOTAL = 51.3% GRATING CALCULATIONS Lattitude 47deg 191.37"N Scale: NTS Longitude: 122deg 5914.1' MS&A Takegami and Wennemark Float Project • 8 Attachment 1. Habitat Survey A SCUBA survey was done August 8,2011,a sunny day,from approximately 2:10 PM to 3:15 PM at the project site.Amy Leitman and Lynn Goodwin used SCUBA to run six t wisects to identify flora,fauna,substrate types, and other qualitative information relative to the proposed project.Water visibility was approximately 8-12'. The six transects(Tl T6)were all parallel and oriented generally 108/288°True North.The attached Transect Map shows the transect locations. Tl Distance in feet Tidal elevation Substrate Macroalgae from baseline min feet density. (MILLW) % coveragelsquare meter along transect 0-25 Dane grass 25,water's edge 11.5 25-35 sand,cobble, barnacles,shell, rock 35 10.5 35-105 45 8.5 55 7.5 65 6.5 75 4.5 85 3.6 95 2.6 105 1.6 105-125 sand,cobble, barnacles,shell, rock,mud N15hA Takegami and Wennemark Float Project• 9 115 0.6 125 -0.4 125-205 2-5%Ulva 125-250 sand,mud, diatoms 135 -1.4 165 -4.2 175 -3.3 205 -43 215 -53 Polinices lewisii (moon snails) and Pilaster brevispimis Pink sea star 225 -6.3 230 -83 235 -9.3 240 -10.2 245 -12.2 250 -13.2 T2 Distance in feet Tidal elevation Substrate Macroalgae from baseline in feet density. (nM XW) % coveragelsquare meter along transect 90 0.8 90-226 sand,mud, diatoms,shell 100 -0.2 100-130 2-5%Ulva 100-120 Polmices lewisd (moon snails), Pisaster brevispinus ink sea stars) 120 -1.2 150 -2.2 170 -3.2 200 -3.1 200-250 Panope abrupta (geoducks), Polinices lewisii (moon snails), Pilaster brevispimrs (Pink sea stars), C.gracilis Graceful crab MSOA Takegami and Wennemark Float Project • 10 210 -6.1 220 -9.1 220-250 sand,mud,shell 2%Gracilaria 230 -12.1 240 -13.1 250 -14.1 T3 Distance in feet Tidal elevation Substrate Macroalgae from baseline in feet density. (MLLW) % coverage/square meter along transect 120 -1.0 120-170 3-5%Ulva 120-220 J�;sand, 130 -2.0 150 -3.0 160 -3.0 160-170 Pisaster brevispinus (Pink sea stars), Polinices lewisii moon snails 170 -3.0 185 -4.0 200 -5.0 200-210 1%Gracilaria 200-250 Panope abrupta (geoducks), Pisaster brevispinus sea stars), 210 -7.0 220 -9.0 220-250 sand,mud, diatoms 230 -11.0 240 -12.0 250 -16.0 MS&A Takogami and Wennemark Float Project • 11 T4 Distance in feet Tidal elevation Substrate Macroalgae from baseline in feet density. (MLLW) % coveragelsquare meter along transect 120 -1.0 120-150 10'�o Ulva 120-250 sand,mud, diatoms 150 -2.0 150-170 Pisaster 3%Ulva brevispinus (Pink sea stars), Polmices lewisii moon snails 160 -2.0 170 -3.0 180 -4.0 190 -5.0 200 -6.0 210 -7.0 220 -9.0 220-250 Panope abrupta (geoducks), Dermasterias imbricata Cher star 230 -12.0 240 -14.0 250 T5 Distance in feet Tidal elevation Substrate Macroalgae from baseline in feet density. (MLLW) % coverage/square meter along trausect 120 -1.0 120-190 sand,mud, 20%Ulva cobble,shell 190 -5.0 190-220 sand,mud, diatom 210 -8.0 220 -10.0 220-230 sand,mud, 1-2%Gracilaria diatom,cobble, peagrayeI MS&A Takegami and Wennemark Float Project • 12 230 -11.9 230-250 sand,mud, diatom 240 -13.9 250 -16.9 T6 Distance in feet Tidal elevation Substrate Macroalgae from baseline in feet density. (WLR) % coveragelsquare meter along transect 110 110-120 20%Ulva 110-150 sand,mud, shell, diatoms 120 -0.9 120-130 10%Ulva 130 -0.9 130-150 3%Ulva 140 -1.9 150 -2.9 150-210 sand,mud,shell, Polinices lewisii moon snails 160 -3.9 170 -4.9 180 -5.9 190 -7.9 200 -8.9 210 -9.9 210-250 sand,mud,shell 220 -11.9 230 -13.9 240 -14.9 250 -17.9 Panope abrupta eoducks MSELA Takegami and Wennemark Float Project • 13 l Attachment 2. Habitat Survey Map TAKEGAMI AND WENNEMARK FLOAT PROJECT. Hive conducted on Distance and August 8,2011 corrected tidal Tl T2 T3 T4 T5 T6 halo vot 250 1 --16.0 MACROALGAE AND ��O T _ 240 %COVERAGE PER -12.0 SQUARE METER: 26, _ 230 y G= Graci laria M 16 - 220 16 200 - -5.0 4 Q\ 25' 10' 3.6 2-5 _ 160 U 3 Ut -3.0 3-5 , u; _ 140 IOU 3 -2.3 10 U31- 120 2_ -1.0 5 20 U- - i - 80 - 60 - 40 - 20 Distance and corrected tidal elevation(MLLW) in feet along 0 BASELINE intersection of the beach and bluff PL MS&A Takegami and Wennemark Float Project • 14